diff --git a/levels/chapter_01.json b/levels/chapter_01.json
index 2ceca82..796b325 100644
--- a/levels/chapter_01.json
+++ b/levels/chapter_01.json
@@ -77,7 +77,10 @@
 			"id": "increment_input",
 			"name": "Incrementer",
 			"description": "Add one to each input number",
-			"init_board": "     \n o   \n 5   \n     \n *+  \n  M2 \n     \n     \n     \n",
+			"init_board": {
+			    "grid": "         \n\n\n   o\n   5\n\n   *|\n    A2\n\n\n\n",
+				"comments": []
+			},
 			"stages": [{
 				"input": [93, 47, 71],
 				"output": [94, 48, 72]
diff --git a/src/main.rs b/src/main.rs
index c48c361..9659834 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -335,7 +335,6 @@ impl Game {
 
 	fn save_config(&self) {
 		let path = userdata_dir().join(CONFIG_FILE_NAME);
-		// todo save more than just input
 		let json = serde_json::to_string_pretty(&self.globals.config).unwrap();
 		let mut f = File::create(path).unwrap();
 		f.write_all(json.as_bytes()).unwrap();
diff --git a/src/marble_engine/grid.rs b/src/marble_engine/grid.rs
index a958be1..30a04cb 100644
--- a/src/marble_engine/grid.rs
+++ b/src/marble_engine/grid.rs
@@ -255,7 +255,7 @@ impl Grid {
 					let texture = textures.get(texname);
 					draw_scaled_texture(d, texture, px, py, scale);
 					#[cfg(debug_assertions)]
-					// TODO: some in-game option to show power direction
+					// todo some in-game option to show power direction
 					if let Tile::Powerable(_, state) = &tile {
 						for dir in Direction::ALL {
 							if state.get_dir(dir) {
diff --git a/src/ui.rs b/src/ui.rs
index 3a9bc42..e211105 100644
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -38,7 +38,6 @@ impl ShapedText {
 		}
 		self.max_width = width;
 		self.lines.clear();
-		// todo remove leading space on broken lines
 		// todo fix splitting very long words
 		let mut line_start = 0;
 		let mut line_end = 0;