diff --git a/src/config.rs b/src/config.rs
index d316ca6..d0da040 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -9,19 +9,21 @@ pub const UI_BUTTON_NORMAL: Color = Color::srgb(0.15, 0.15, 0.15); // Button col
 pub const UI_BUTTON_HOVERED: Color = Color::srgb(0.25, 0.25, 0.25); // ... when it's hovered
 pub const UI_BUTTON_PRESSED: Color = Color::srgb(0.55, 0.55, 0.55); // ... when it's pressed
 
-pub(crate) const BACKGROUND_COLOR: Color = Color::srgb(0.3, 0.3, 0.3);
+pub(crate) const BACKGROUND_COLOR: Color = Color::srgb(0.1, 0.1, 0.1);
 pub(crate) const PLAYER_SHIP_COLOR: Color = Color::srgb(1.0, 1.0, 1.0);
 pub(crate) const SHIP_THRUSTER_COLOR_ACTIVE: Color = Color::srgb(1.0, 0.2, 0.2);
 pub(crate) const SHIP_THRUSTER_COLOR_INACTIVE: Color = Color::srgb(0.5, 0.5, 0.5);
 pub(crate) const SHIP_FIRE_RATE: f32 = 3.0; // in bullets-per-second
-pub(crate) const ASTEROID_SMALL_COLOR: Color = Color::srgb(1.0, 0., 0.);
-pub(crate) const BULLET_COLOR: Color = Color::srgb(0.0, 0.1, 0.9);
+pub(crate) const ASTEROID_SMALL_COLOR: Color = Color::srgb(0.9, 0.9, 0.9);
+pub(crate) const ASTEROID_MEDIUM_COLOR: Color = Color::srgb(0.8, 0.8, 0.8);
+pub(crate) const ASTEROID_LARGE_COLOR: Color = Color::srgb(0.6, 0.6, 0.6);
+pub(crate) const BULLET_COLOR: Color = Color::srgb(0.9, 0.9, 0.9);
 // TODO: asteroid medium & large
 
-pub(crate) const SHIP_THRUST: f32 = 1.0;
+pub(crate) const SHIP_THRUST: f32 = 4.0;
 pub(crate) const SHIP_ROTATION: f32 = 4.0; // +/- rotation speed in... radians per frame
 
-pub(crate) const BULLET_SPEED: f32 = 150.0;
+pub(crate) const BULLET_SPEED: f32 = 500.0;
 pub(crate) const BULLET_LIFETIME: f32 = 2.0;
 
 pub(crate) const ASTEROID_LIFETIME: f32 = 40.0;
diff --git a/src/lib.rs b/src/lib.rs
index e5bd1e4..fd22ed9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -11,9 +11,9 @@ mod resources;
 mod widgets;
 
 use crate::config::{
-    ASTEROID_SMALL_COLOR, BACKGROUND_COLOR, BULLET_COLOR, BULLET_LIFETIME, BULLET_SPEED,
-    PLAYER_SHIP_COLOR, SHIP_ROTATION, SHIP_THRUST, SHIP_THRUSTER_COLOR_ACTIVE,
-    SHIP_THRUSTER_COLOR_INACTIVE,
+    ASTEROID_LARGE_COLOR, ASTEROID_MEDIUM_COLOR, ASTEROID_SMALL_COLOR, BACKGROUND_COLOR,
+    BULLET_COLOR, BULLET_LIFETIME, BULLET_SPEED, PLAYER_SHIP_COLOR, SHIP_ROTATION, SHIP_THRUST,
+    SHIP_THRUSTER_COLOR_ACTIVE, SHIP_THRUSTER_COLOR_INACTIVE,
 };
 use crate::machinery::AsteroidSpawner;
 use crate::objects::{Bullet, Ship, Weapon};
diff --git a/src/objects.rs b/src/objects.rs
index 30d3f1a..7509101 100644
--- a/src/objects.rs
+++ b/src/objects.rs
@@ -83,9 +83,9 @@ pub fn spawn_asteroid(
         };
 
         let collider_radius = match spawn.size {
-            AsteroidSize::Small => 10.0,
-            AsteroidSize::Medium => 20.0,
-            AsteroidSize::Large => 40.0,
+            AsteroidSize::Small => 5.0,
+            AsteroidSize::Medium => 10.0,
+            AsteroidSize::Large => 20.0,
         };
 
         commands.spawn((
diff --git a/src/resources.rs b/src/resources.rs
index 0df6ca8..feccdcc 100644
--- a/src/resources.rs
+++ b/src/resources.rs
@@ -9,7 +9,7 @@ use bevy::{
     },
     math::{
         Vec2,
-        primitives::{Circle, Triangle2d},
+        primitives::{Polyline2d, Segment2d, Triangle2d},
     },
     mesh::Mesh,
     prelude::{Deref, DerefMut, Reflect, ReflectResource},
@@ -19,8 +19,9 @@ use bevy_inspector_egui::InspectorOptions;
 use bevy_inspector_egui::inspector_options::ReflectInspectorOptions;
 
 use crate::{
-    ASTEROID_SMALL_COLOR, BULLET_COLOR, PLAYER_SHIP_COLOR, SHIP_THRUSTER_COLOR_ACTIVE,
-    SHIP_THRUSTER_COLOR_INACTIVE, config::WINDOW_SIZE,
+    ASTEROID_LARGE_COLOR, ASTEROID_MEDIUM_COLOR, ASTEROID_SMALL_COLOR, BULLET_COLOR,
+    PLAYER_SHIP_COLOR, SHIP_THRUSTER_COLOR_ACTIVE, SHIP_THRUSTER_COLOR_INACTIVE,
+    config::WINDOW_SIZE,
 };
 
 #[derive(InspectorOptions, Reflect, Resource, Debug, Deref, Clone, Copy)]
@@ -83,15 +84,15 @@ impl GameAssets {
     }
 
     pub fn asteroid_small(&self) -> (Handle<Mesh>, Handle<ColorMaterial>) {
-        (self.meshes[1].clone(), self.materials[1].clone())
+        (self.meshes[1].clone(), self.materials[3].clone())
     }
 
     pub fn asteroid_medium(&self) -> (Handle<Mesh>, Handle<ColorMaterial>) {
-        (self.meshes[2].clone(), self.materials[2].clone())
+        (self.meshes[2].clone(), self.materials[4].clone())
     }
 
     pub fn asteroid_large(&self) -> (Handle<Mesh>, Handle<ColorMaterial>) {
-        (self.meshes[3].clone(), self.materials[3].clone())
+        (self.meshes[3].clone(), self.materials[5].clone())
     }
 
     pub fn bullet(&self) -> (Handle<Mesh>, Handle<ColorMaterial>) {
@@ -124,10 +125,63 @@ impl FromWorld for GameAssets {
                 Vec2::new(-0.5, 0.45),
                 Vec2::new(-0.5, -0.45),
             )),
-            world_meshes.add(Circle::new(10.0)),
-            world_meshes.add(Circle::new(20.0)),
-            world_meshes.add(Circle::new(40.0)),
-            world_meshes.add(Circle::new(0.2)),
+            world_meshes.add(Polyline2d::new(
+                [
+                    Vec2::new(0.1, 0.0),
+                    Vec2::new(0.8, 0.2),
+                    Vec2::new(0.8, 0.3),
+                    Vec2::new(0.1, 1.0),
+                    Vec2::new(-0.5, 1.0),
+                    Vec2::new(-0.3, 0.3),
+                    Vec2::new(-1.0, 0.3),
+                    Vec2::new(-1.0, -0.2),
+                    Vec2::new(-0.5, -1.0),
+                    Vec2::new(0.1, -0.8),
+                    Vec2::new(0.5, -0.9),
+                    Vec2::new(1.0, -0.4),
+                    Vec2::new(0.1, 0.0),
+                ]
+                .into_iter()
+                .map(|vert| vert * 5.0),
+            )),
+            world_meshes.add(Polyline2d::new(
+                [
+                    Vec2::new(0.6, 0.3),
+                    Vec2::new(1.0, 0.6),
+                    Vec2::new(0.6, 1.0),
+                    Vec2::new(0.1, 0.8),
+                    Vec2::new(-0.4, 1.0),
+                    Vec2::new(-1.0, 0.6),
+                    Vec2::new(-0.8, -0.1),
+                    Vec2::new(-1.0, -0.5),
+                    Vec2::new(-0.4, -1.0),
+                    Vec2::new(-0.3, -0.7),
+                    Vec2::new(0.6, -1.0),
+                    Vec2::new(1.0, -0.3),
+                    Vec2::new(0.6, 0.3),
+                ]
+                .into_iter()
+                .map(|vert| vert * 10.0),
+            )),
+            world_meshes.add(Polyline2d::new(
+                [
+                    Vec2::new(1.0, -0.1),
+                    Vec2::new(1.0, 0.3),
+                    Vec2::new(0.4, 1.0),
+                    Vec2::new(-0.2, 1.0),
+                    Vec2::new(-0.9, 0.3),
+                    Vec2::new(-0.5, 0.1),
+                    Vec2::new(-0.9, -0.1),
+                    Vec2::new(-0.5, -1.0),
+                    Vec2::new(0.0, 0.0),
+                    Vec2::new(0.0, -1.0),
+                    Vec2::new(0.5, -1.0),
+                    Vec2::new(1.0, -0.1),
+                ]
+                .into_iter()
+                .map(|vert| vert * 20.0),
+            )),
+            world_meshes.add(Segment2d::new(Vec2::new(-0.1, 0.0), Vec2::new(0.1, 0.0))),
         ];
         let mut world_materials = world.resource_mut::<Assets<ColorMaterial>>();
         let materials = [
@@ -136,8 +190,8 @@ impl FromWorld for GameAssets {
             world_materials.add(SHIP_THRUSTER_COLOR_ACTIVE),
             world_materials.add(ASTEROID_SMALL_COLOR),
             // TODO: asteroid medium and large colors
-            world_materials.add(ASTEROID_SMALL_COLOR),
-            world_materials.add(ASTEROID_SMALL_COLOR),
+            world_materials.add(ASTEROID_MEDIUM_COLOR),
+            world_materials.add(ASTEROID_LARGE_COLOR),
             world_materials.add(BULLET_COLOR),
         ];
         let loader = world.resource_mut::<AssetServer>();