diff --git a/Cargo.lock b/Cargo.lock
index 4fccc48..616a3a3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -338,9 +338,9 @@ dependencies = [
 
 [[package]]
 name = "bevy-inspector-egui"
-version = "0.28.0"
+version = "0.28.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd64580f4496ed987c6231c6a7d833068914331a9084bf5a3dd9dcbc66fd8a73"
+checksum = "36172627eb6fd8586600972bcbba2880ed6f59e4e243dcf2ed7ff68d987577ce"
 dependencies = [
  "bevy-inspector-egui-derive",
  "bevy_app",
@@ -2402,7 +2402,7 @@ dependencies = [
  "vec_map",
  "wasm-bindgen",
  "web-sys",
- "windows 0.52.0",
+ "windows 0.58.0",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 1c7bdcf..a7e54b7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,7 +30,7 @@ bevy = { version = "0.15", default-features = false, features = [
     "bevy_gltf",
     "bevy_mesh_picking_backend",
     "bevy_pbr",
-    "bevy_picking",
+    # "bevy_picking",
     "bevy_render",
     "bevy_scene",
     "bevy_sprite",
@@ -84,6 +84,9 @@ android_logger = "0.14"
 [profile.dev]
 opt-level = 1
 
+[profile.release]
+debug = true
+
 # Enable a large amount of optimization in the dev profile for dependencies.
 [profile.dev.package."*"]
 opt-level = 3
diff --git a/src/camera.rs b/src/camera.rs
index d7a264c..fae1f10 100644
--- a/src/camera.rs
+++ b/src/camera.rs
@@ -1,13 +1,15 @@
-use bevy::{math::NormedVectorSpace, picking::{focus::HoverMap, pointer::PointerId}, prelude::*, utils::HashMap, window::PrimaryWindow};
+use std::time::Duration;
+
+use bevy::{input::mouse::MouseWheel, math::NormedVectorSpace, picking::{focus::HoverMap, pointer::PointerId}, prelude::*, utils::HashMap, window::PrimaryWindow};
 
 use crate::ui;
 
 pub struct Plugin;
 impl bevy::prelude::Plugin for Plugin {
     fn build(&self, app: &mut App) {
-        app.add_systems(Startup, setup)
-            .add_systems(Update, move_cam)
-            .init_resource::<Pointers>();
+        app.add_systems(Startup, setup);
+            // .add_systems(Update, move_cam)
+            // .init_resource::<Pointers>();
     }
 }
 
@@ -15,40 +17,39 @@ fn setup(mut cmds: Commands, window: Query<&Window>) {
     let zoom = 2./window.single().width().min(window.single().height());
     cmds.spawn((
         Camera2d,
-        Transform::from_scale(Vec3::new(zoom, zoom, 1.))
+        Transform::from_scale(Vec3::new(zoom, zoom, zoom))
     ));
 }
 
 #[derive(Resource, Default)]
-struct Pointers(HashMap<PointerId, Vec2>);
+struct Pointers(HashMap<PointerId, (Vec2, Option<Duration>)>);
 
 fn move_cam(
     mut cam: Query<&mut Transform, With<Camera2d>>,
     map_ui_entity: Query<Entity, With<ui::MapUIComponent>>,
     mouse_buttons: Res<ButtonInput<MouseButton>>,
+    mut ev_scroll: EventReader<MouseWheel>,
     touches: Res<Touches>,
     window: Query<&Window, With<PrimaryWindow>>,
     mut pointers: ResMut<Pointers>,
-    hover_map: Res<HoverMap>
+    hover_map: Res<HoverMap>,
+    time: Res<Time>
 ) {
     let window = window.single();
     let mut cam = cam.single_mut();
     let map_ui_entity = map_ui_entity.single();
     let ps = hover_map.iter().filter_map(|(id, hit_map)| match id {
-            PointerId::Mouse => window.cursor_position().map(|p| (mouse_buttons.pressed(MouseButton::Left), p, pointers.0.get(id).map(|p| *p).unwrap_or(p))),
-            PointerId::Touch(i) => touches.get_pressed(*i).map(|t| (true, t.position(), t.previous_position())),
+            PointerId::Mouse => window.cursor_position().map(|p| 
+                match pointers.0.get(id) {
+                    Some(p_cache) => (p_cache.1.filter(|_| mouse_buttons.pressed(MouseButton::Left)), p, p_cache.0),
+                    None => (None, p, p)
+                }
+            ),
+            PointerId::Touch(i) => touches.get_pressed(*i).map(|t| (pointers.0.get(id).map(|(pos, start)| (*start).unwrap_or(time.elapsed())), t.position(), t.previous_position())),
             _ => None
-        }.map(|(pressed,new_pos, old_pos)| (pressed,new_pos,old_pos,id,hit_map))
+        }.map(|(pressed_start,new_pos, old_pos)| (pressed_start,new_pos,old_pos,id,hit_map))
     ).collect::<Vec<_>>();
-    let pressed_on_map = ps.iter().filter(|p| p.0 && p.4.contains_key(&map_ui_entity)).collect::<Vec<_>>();
-    // let mut movement = Vec2::ZERO;
-    // for (pressed, new_pos, old_pos, id, hit_map) in pressed_on_map.iter() {
-    //     let delta = new_pos - old_pos;
-    //     cam.scale += delta.dot(movement)/delta.norm();
-    //     movement.x -= delta.x*cam.scale.x/pressed_num as f32;
-    //     movement.y += delta.y*cam.scale.y/pressed_num as f32;
-    //     pointers.0.insert(**id, *new_pos);
-    // }
+    let pressed_on_map = ps.iter().filter(|p| p.0.is_some() && p.4.contains_key(&map_ui_entity)).collect::<Vec<_>>();
     
     let old_midpoint = pressed_on_map.iter().fold(Vec2::ZERO, |acc, (_, _, old_pos, _, _)| {
         acc + (old_pos/pressed_on_map.len() as f32)
@@ -56,9 +57,12 @@ fn move_cam(
     let new_midpoint = pressed_on_map.iter().fold(Vec2::ZERO, |acc, (_, new_pos, _, _, _)| {
         acc + (new_pos/pressed_on_map.len() as f32)
     });
+
+    // move camera
     cam.translation.x -= (new_midpoint.x - old_midpoint.x)*cam.scale.x;
     cam.translation.y += (new_midpoint.y - old_midpoint.y)*cam.scale.y;
     
+    // multiple fingers zoom
     if pressed_on_map.len() > 1 {
         let old_d_to_midpoint = pressed_on_map.iter().fold(0., |acc, (_, _, old_pos, _, _)| {
             acc + (old_midpoint-old_pos).norm()
@@ -67,12 +71,22 @@ fn move_cam(
             acc + (new_midpoint-new_pos).norm()
         });
         let zoom = new_d_to_midpoint/old_d_to_midpoint;
-        dbg!(zoom);
-        cam.scale.x /= zoom;
-        cam.scale.y /= zoom;
+        cam.scale /= zoom;
     }
 
-    for (_, new_pos, _, id, _) in ps {
-        pointers.0.insert(*id, new_pos);
+    // mouse scroll zoom
+    for ev in ev_scroll.read() {
+        let scale = (cam.scale.x-(ev.y*0.1/window.width().min(window.height()))).clamp(0.0001, 2./window.width().min(window.height()));
+        cam.scale = Vec3::new(scale, scale, scale);
+    }
+
+    // update cached pointer positions
+    pointers.0.clear();
+    for (pressed_start, new_pos, _, id, _) in ps {
+        match id {
+            PointerId::Mouse => {pointers.0.insert(*id, (new_pos, pressed_start));},
+            PointerId::Touch(_) => {pointers.0.insert(*id, (new_pos, pressed_start));},
+            _ => {}
+        }
     }
 }
\ No newline at end of file
diff --git a/src/map.rs b/src/map.rs
index b1d6db1..d8c32be 100644
--- a/src/map.rs
+++ b/src/map.rs
@@ -1,9 +1,13 @@
-use bevy::{asset::RenderAssetUsages, prelude::*, render::mesh::{Indices, PrimitiveTopology}};
+use std::time::Duration;
+
+use bevy::{asset::RenderAssetUsages, picking::PickSet, prelude::*, render::mesh::{Indices, PrimitiveTopology}, utils::HashMap};
 use noise::{Fbm, MultiFractal, NoiseFn, Perlin};
-use rand::{Rng, SeedableRng};
+use rand::{thread_rng, Rng, SeedableRng};
 use voronoice::{BoundingBox, Point, VoronoiBuilder};
 
 mod cells;
+mod picking;
+use picking::*;
 use cells::*;
 
 pub struct Plugin;
@@ -12,8 +16,10 @@ impl bevy::prelude::Plugin for Plugin {
         app.add_systems(Startup, setup)
             .insert_resource(Time::<Fixed>::from_seconds(0.25)) // Time for a day
             .add_systems(FixedUpdate, update_cells)
+            .add_systems(PreUpdate, picking_backend.in_set(PickSet::Backend))
+            .add_systems(Update, update_map_mesh)
             .insert_resource(ClearColor(Color::srgb(0., 0., 1.)))
-            .insert_resource(Seed(0));
+            .insert_resource(Seed(thread_rng().gen()));
     }
 }
 
@@ -28,7 +34,7 @@ pub const SIZE: usize = 10000;
 struct Seed(u32);
 
 #[derive(Component)]
-struct Voronoi (voronoice::Voronoi);
+pub struct Voronoi (voronoice::Voronoi);
 
 #[derive(Component)]
 pub struct MapMarker;
@@ -36,6 +42,12 @@ pub struct MapMarker;
 #[derive(Component)]
 struct MapColors (Vec<[f32; 4]>);
 
+#[derive(Component)]
+pub struct CellsEntities (Vec<Entity>);
+
+#[derive(Component)]
+pub struct MeshNeedsUpdate(bool);
+
 fn setup(
     mut cmds: Commands,
     mut meshes: ResMut<Assets<Mesh>>,
@@ -73,7 +85,7 @@ fn setup(
         } else if z <= 0.52 {
             CellKind::Beach
         } else if z < 0.8 {
-            CellKind::Grass
+            CellKind::Dirt
         } else {
             CellKind::Stone
         };
@@ -118,21 +130,36 @@ fn setup(
         )
         .with_inserted_indices(Indices::U32(indices));
 
+    let mut cells_entities = Vec::with_capacity(cells_data.len());
     cmds.spawn((
         Mesh2d(meshes.add(mesh)),
         MeshMaterial2d(materials.add(ColorMaterial::default())),
         Transform::default(),
         Voronoi(voronoi),
         MapColors(colors),
+        MeshNeedsUpdate(true),
         MapMarker
     )).with_children(|parent| {
         for cd in cells_data {
-            match cd.kind {
-                CellKind::Forest | CellKind::Grass => parent.spawn((cd, LastUpdate(0))),
-                _ => parent.spawn(cd)
-            };
+            let mut cmd = parent.spawn((cd, LastUpdate(0)));
+            cmd.observe(|trigger: Trigger<Pointer<Click>>, mut cells: Query<&mut CellData>, mut map_needs_update: Query<&mut MeshNeedsUpdate, With<MapMarker>>| {
+                if trigger.duration > Duration::from_millis(100) {
+                    return
+                }
+                let mut cd = cells.get_mut(trigger.target).unwrap();
+                match cd.kind {
+                    CellKind::Dirt | CellKind::Grass => {
+                        cd.kind = CellKind::Forest;
+                        map_needs_update.single_mut().0 = true;
+                    },
+                    _ => {}
+                }
+                dbg!(trigger.duration);
+            });
+            cells_entities.push(cmd.id());
         }
-    });
+    }).insert(CellsEntities(cells_entities));
+
 }
 
 #[derive(Component)]
@@ -140,32 +167,43 @@ pub struct LastUpdate(usize);
 
 fn update_cells(
     mut cells: Query<(&mut CellData, &mut LastUpdate)>,
-    mut map: Query<(&Mesh2d, &mut MapColors), With<MapMarker>>,
-    mut meshes: ResMut<Assets<Mesh>>
+    mut map_needs_update: Query<&mut MeshNeedsUpdate, With<MapMarker>>
 ) {
-    let (mesh, mut cols) = map.single_mut();
-    if let Some(mesh) = meshes.get_mut(mesh) {
-        // let cols = mesh.attribute_mut(Mesh::ATTRIBUTE_COLOR).unwrap();
-        let mut modified = false;
-        for (mut cd, mut lu) in cells.iter_mut() {
-            lu.0 += 1;
-            if lu.0 > match cd.kind {
-                CellKind::Void | CellKind::Sea | CellKind::Beach | CellKind::Dirt | CellKind::Stone => usize::MAX,
-                CellKind::Forest => 100*365/4, // Let's say that a forest takes 100 years to mature
-                CellKind::Grass => 7*7/4 // Let's say that grass takes 7 weaks to reach its max
-            } {
-                lu.0 = 0;
-                cd.resource = (cd.resource + 1).clamp(0, 4);
-                modified = true;
-            }
-            // cd.update();
-            let col = cd.color();
-            for id in cd.vertices.iter() {
-                cols.0[*id] = col.clone();
-            }
-        }
-        if modified {
-            mesh.insert_attribute(Mesh::ATTRIBUTE_COLOR, cols.0.clone());
+    let mut map_needs_update = map_needs_update.single_mut();
+    for (mut cd, mut lu) in cells.iter_mut() {
+        lu.0 += 1;
+        if lu.0 > match cd.kind {
+            CellKind::Void | CellKind::Sea | CellKind::Beach | CellKind::Dirt | CellKind::Stone => usize::MAX,
+            CellKind::Forest => 100*365/4, // Let's say that a forest takes 100 years to mature
+            CellKind::Grass => 7*7/4 // Let's say that grass takes 7 weaks to reach its max
+        } {
+            lu.0 = 0;
+            cd.resource = (cd.resource + 1).clamp(0, 4);
+            map_needs_update.0 = true;
         }
     }
+}
+
+fn update_map_mesh(
+    cells: Query<&CellData>,
+    mut map: Query<(&Mesh2d, &mut MapColors, &mut MeshNeedsUpdate), With<MapMarker>>,
+    mut meshes: ResMut<Assets<Mesh>>
+) {
+    let (mesh, mut cols, mut needs_update) = map.single_mut();
+    if needs_update.0 {
+        if let Some(mesh) = meshes.get_mut(mesh) {
+            let mut modified = false;
+            for cd in cells.iter() {
+                let col = cd.color();
+                for id in cd.vertices.iter() {
+                    modified = modified || cols.0[*id] != col;
+                    cols.0[*id] = col.clone();
+                }
+            }
+            if modified {
+                mesh.insert_attribute(Mesh::ATTRIBUTE_COLOR, cols.0.clone());
+            }
+        }
+        needs_update.0 = false;
+    }
 }
\ No newline at end of file
diff --git a/src/map/picking.rs b/src/map/picking.rs
new file mode 100644
index 0000000..d4a8f3e
--- /dev/null
+++ b/src/map/picking.rs
@@ -0,0 +1,39 @@
+use bevy::{picking::{backend::{HitData, PointerHits}, pointer::{PointerId, PointerLocation}}, prelude::*, window::PrimaryWindow};
+use voronoice::Point;
+
+use super::{CellsEntities, MapMarker, Voronoi};
+
+pub fn picking_backend(
+    cam: Query<(&Transform, Entity), With<Camera2d>>,
+    window: Query<&Window, With<PrimaryWindow>>,
+    pointers: Query<(&PointerId, &PointerLocation)>,
+    map: Query<(&Voronoi, &CellsEntities, &Transform), With<MapMarker>>,
+    mut output: EventWriter<PointerHits>
+) {
+    let (cam, cam_id) = cam.single();
+    let window = window.single();
+    let (voronoi, cells_entities, map_pos) = map.single();
+    let mut last_cell = 0;
+    for (id, l) in pointers.iter() {
+        if let Some(mut pos) = l.location().map(|l| l.position) {
+            pos -= window.size()/2.;
+            pos *= cam.scale.xy();
+            pos.x += cam.translation.x;
+            pos.y -= cam.translation.y;
+            if let Some(c) = voronoi.0.cell(last_cell).iter_path(Point { x: pos.x as f64, y: -pos.y as f64 }).last() {
+                last_cell = c;
+                output.send(PointerHits {
+                    pointer: *id,
+                    picks: vec![(cells_entities.0[c], HitData {
+                        camera: cam_id,
+                        depth: map_pos.translation.z,
+                        position: Some(Vec3 { x: pos.x, y: pos.y, z: map_pos.translation.z }),
+                        normal: None
+                    })],
+                    order: map_pos.translation.z
+                });
+            }
+
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/ui.rs b/src/ui.rs
index 5fb0e34..c4c5031 100644
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -1,12 +1,20 @@
-use bevy::prelude::*;
+use std::collections::BTreeMap;
+
+use bevy::{input::mouse::MouseWheel, math::{NormedVectorSpace, VectorSpace}, picking::{focus::HoverMap, pointer::PointerId}, prelude::*, utils::HashMap, window::PrimaryWindow};
+
+use crate::map::{self, MapMarker};
 
 pub struct Plugin;
 impl bevy::prelude::Plugin for Plugin {
     fn build(&self, app: &mut App) {
-        app.add_systems(Startup, setup);
+        app.add_systems(Startup, setup)
+            .add_systems(Update, zoom_with_scroll);
     }
 }
 
+#[derive(Component)]
+struct PointersDragging(HashMap<PointerId, Vec2>);
+
 #[derive(Component)]
 pub struct MapUIComponent;
 
@@ -21,7 +29,68 @@ fn setup(
             justify_content: JustifyContent::Center,
             ..default()
         },
-        MapUIComponent
-    ));
+        PickingBehavior {
+            should_block_lower: false,
+            is_hoverable: true
+        },
+        MapUIComponent,
+        PointersDragging(HashMap::new())
+    )).observe(|trigger: Trigger<Pointer<DragStart>>, mut ptrs: Query<&mut PointersDragging>| {
+        let event = trigger.event();
+        // dbg!(event);
+        if event.button == PointerButton::Primary {
+            ptrs.get_mut(event.target).unwrap().0.insert(event.pointer_id, event.pointer_location.position);
+        }
+    }).observe(|trigger: Trigger<Pointer<DragEnd>>, mut ptrs: Query<&mut PointersDragging>| {
+        let event = trigger.event();
+        // dbg!(event);
+        if event.button == PointerButton::Primary {
+            ptrs.get_mut(event.target).unwrap().0.remove(&event.pointer_id);
+        }
+    }).observe(|
+            trigger: Trigger<Pointer<Drag>>,
+            mut ptrs: Query<&mut PointersDragging>,
+            mut cam: Query<&mut Transform, With<Camera2d>>,
+        | {
+            let event = trigger.event();
+            // dbg!(event);
+            if event.button == PointerButton::Primary {
+                let mut cam = cam.single_mut();
+                let mut ptrs = ptrs.get_mut(event.target).unwrap();
+                
+                let old_midpoint = ptrs.0.values().fold(Vec2::ZERO, |acc, pos| acc + (pos/ptrs.0.len() as f32));
+                let old_d_to_midpoint = ptrs.0.values().fold(0., |acc, pos| acc + (old_midpoint-pos).norm());
+                ptrs.0.insert(event.pointer_id, event.pointer_location.position);
+                let new_midpoint = ptrs.0.values().fold(Vec2::ZERO, |acc, pos| acc + (pos/ptrs.0.len() as f32));
+                let new_d_to_midpoint = ptrs.0.values().fold(0., |acc, pos| acc + (new_midpoint-pos).norm());
+
+                // move camera
+                cam.translation.x -= (new_midpoint.x - old_midpoint.x)*cam.scale.x;
+                cam.translation.y += (new_midpoint.y - old_midpoint.y)*cam.scale.y;
+            
+                if ptrs.0.len() > 1 {
+                    cam.scale *= old_d_to_midpoint/new_d_to_midpoint;
+                }
+            }
+        }
+    );
     // Spawn all ui elements as children of this one
+}
+
+fn zoom_with_scroll(
+    mut cam: Query<&mut Transform, With<Camera2d>>,
+    mut ev_scroll: EventReader<MouseWheel>,
+    hover_map: Res<HoverMap>,
+    window: Query<&Window, With<PrimaryWindow>>,
+    map_ui_id: Query<Entity, With<MapUIComponent>>
+) {
+    let map_ui_id = map_ui_id.single();
+    if hover_map.get(&PointerId::Mouse).and_then(|hovered_ids| hovered_ids.get(&map_ui_id)).is_some() {
+        let window = window.single();
+        let mut cam = cam.single_mut();
+        for ev in ev_scroll.read() {
+            let scale = (cam.scale.x-(ev.y*0.1/window.width().min(window.height()))).clamp(0.0001, 2./window.width().min(window.height()));
+            cam.scale = Vec3::new(scale, scale, scale);
+        }
+    }
 }
\ No newline at end of file