diff --git a/assets/pause.png b/assets/pause.png
new file mode 100644
index 0000000..d637d3d
Binary files /dev/null and b/assets/pause.png differ
diff --git a/assets/play.png b/assets/play.png
new file mode 100644
index 0000000..be003db
Binary files /dev/null and b/assets/play.png differ
diff --git a/assets/stop.png b/assets/stop.png
new file mode 100644
index 0000000..ac0f9a1
Binary files /dev/null and b/assets/stop.png differ
diff --git a/src/editor.rs b/src/editor.rs
index 8d3e515..bb17851 100644
--- a/src/editor.rs
+++ b/src/editor.rs
@@ -3,6 +3,7 @@ use std::{mem::transmute, ops::Rem};
 use raylib::prelude::*;
 
 use crate::{
+	draw_scaled_texture,
 	level::Level,
 	marble_engine::{
 		board::{Board, Pos},
@@ -338,7 +339,7 @@ impl Editor {
 		}
 	}
 
-	fn draw_top_bar(&mut self, d: &mut RaylibDrawHandle, _textures: &Textures) {
+	fn draw_top_bar(&mut self, d: &mut RaylibDrawHandle, textures: &Textures) {
 		// background
 		d.draw_rectangle(
 			0,
@@ -372,6 +373,38 @@ impl Editor {
 			d.draw_text("save", 95, 10, 20, Color::WHITE);
 		}
 
+		match self.sim_state {
+			SimState::Editing => {
+				if simple_button(d, 260, 4, 32, 32) {
+					self.start_sim();
+					self.sim_state = SimState::Running;
+				}
+				draw_scaled_texture(d, textures.get("play"), 260, 4, 2.);
+			}
+			SimState::Running => {
+				if simple_button(d, 260, 4, 32, 32) {
+					self.sim_state = SimState::Stepping;
+				}
+				draw_scaled_texture(d, textures.get("pause"), 260, 4, 2.);
+				if simple_button(d, 260 + 36, 4, 32, 32) {
+					self.sim_state = SimState::Editing;
+					self.complete_popup = Popup::Start;
+				}
+				draw_scaled_texture(d, textures.get("stop"), 260 + 36, 4, 2.);
+			}
+			SimState::Stepping => {
+				if simple_button(d, 260, 4, 32, 32) {
+					self.sim_state = SimState::Running;
+				}
+				draw_scaled_texture(d, textures.get("play"), 260, 4, 2.);
+				if simple_button(d, 260 + 36, 4, 32, 32) {
+					self.sim_state = SimState::Editing;
+					self.complete_popup = Popup::Start;
+				}
+				draw_scaled_texture(d, textures.get("stop"), 260 + 36, 4, 2.);
+			}
+		}
+
 		let mut input_text = String::from_utf8_lossy(self.machine.input()).to_string();
 		let width = d.get_screen_width();
 		d.draw_text("input:", width - 260, 10, 20, Color::WHITE);
diff --git a/src/marble_engine/board.rs b/src/marble_engine/board.rs
index d3ee3f3..57f4769 100644
--- a/src/marble_engine/board.rs
+++ b/src/marble_engine/board.rs
@@ -1,4 +1,4 @@
-use crate::Textures;
+use crate::{draw_scaled_texture, Textures};
 
 use super::tile::*;
 use raylib::prelude::*;
@@ -233,13 +233,7 @@ impl Board {
 					let texture = textures.get(&texname);
 					let px = x * tile_size + offset.x as i32;
 					let py = y * tile_size + offset.y as i32;
-					d.draw_texture_ex(
-						texture,
-						Vector2::new(px as f32, py as f32),
-						0.0,
-						(1 << zoom) as f32,
-						Color::WHITE,
-					);
+					draw_scaled_texture(d, texture, px, py, (1 << zoom) as f32);
 				}
 			}
 		}
diff --git a/src/util.rs b/src/util.rs
index f5a2d8f..f686024 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -191,3 +191,14 @@ pub fn texture_option_button<T>(
 pub fn userdata_dir() -> PathBuf {
 	PathBuf::from("user")
 }
+
+pub fn draw_scaled_texture(
+	d: &mut RaylibDrawHandle,
+	texture: &Texture2D,
+	x: i32,
+	y: i32,
+	scale: f32,
+) {
+	let pos = Vector2::new(x as f32, y as f32);
+	d.draw_texture_ex(texture, pos, 0., scale, Color::WHITE);
+}