diff --git a/dev-assets/doodads/buttons/button.js b/dev-assets/doodads/buttons/button.js
index f640ca0..83318fb 100644
--- a/dev-assets/doodads/buttons/button.js
+++ b/dev-assets/doodads/buttons/button.js
@@ -1,8 +1,17 @@
 function main() {
-	console.log("Sticky Button initialized!");
+	console.log("%s initialized!", Self.Doodad.Title);
+
+	var timer = 0;
 
 	Events.OnCollide( function() {
-		console.log("Touched!");
-		Self.Canvas.SetBackground(RGBA(255, 153, 0, 153))
+		if (timer > 0) {
+			clearTimeout(timer);
+		}
+
+		Self.ShowLayer(1);
+		timer = setTimeout(function() {
+			Self.ShowLayer(0);
+			timer = 0;
+		}, 200);
 	})
 }
diff --git a/dev-assets/doodads/buttons/sticky.js b/dev-assets/doodads/buttons/sticky.js
index f640ca0..cf4fe74 100644
--- a/dev-assets/doodads/buttons/sticky.js
+++ b/dev-assets/doodads/buttons/sticky.js
@@ -1,8 +1,7 @@
 function main() {
-	console.log("Sticky Button initialized!");
+	console.log("%s initialized!", Self.Doodad.Title);
 
 	Events.OnCollide( function() {
-		console.log("Touched!");
-		Self.Canvas.SetBackground(RGBA(255, 153, 0, 153))
+		Self.ShowLayer(1);
 	})
 }
diff --git a/dev-assets/doodads/doors/electric-door.js b/dev-assets/doodads/doors/electric-door.js
new file mode 100644
index 0000000..dedae0d
--- /dev/null
+++ b/dev-assets/doodads/doors/electric-door.js
@@ -0,0 +1,35 @@
+function main() {
+	console.log("%s initialized!", Self.Doodad.Title);
+
+	var timer = 0;
+
+	// Animation frames.
+	var frame = 0;
+	var frames = Self.LayerCount();
+	var animationDirection = 1; // forward or backward
+	var animationSpeed = 100;   // interval between frames when animating
+	var animating      = false; // true if animation is actively happening
+
+	console.warn("Electric Door has %d frames", frames);
+
+	// Animation interval function.
+	setInterval(function() {
+		if (!animating) {
+			return;
+		}
+
+		// Advance the frame forwards or backwards.
+		frame += animationDirection;
+		if (frame >= frames) {
+			// Reached the last frame, start the pause and reverse direction.
+			animating = false;
+			frame = frames - 1;
+		}
+
+		Self.ShowLayer(frame);
+	}, animationSpeed);
+
+	Events.OnCollide( function() {
+		animating = true; // start the animation
+	})
+}
diff --git a/dev-assets/doodads/doors/keys.js b/dev-assets/doodads/doors/keys.js
new file mode 100644
index 0000000..ab81605
--- /dev/null
+++ b/dev-assets/doodads/doors/keys.js
@@ -0,0 +1,5 @@
+function main() {
+	Events.OnCollide(function(e) {
+		Self.Destroy();
+	})
+}
diff --git a/dev-assets/doodads/doors/locked-door.js b/dev-assets/doodads/doors/locked-door.js
new file mode 100644
index 0000000..7d1ee7a
--- /dev/null
+++ b/dev-assets/doodads/doors/locked-door.js
@@ -0,0 +1,5 @@
+function main() {
+	Events.OnCollide(function(e) {
+		Self.ShowLayer(1);
+	});
+}
diff --git a/dev-assets/doodads/trapdoors/down.js b/dev-assets/doodads/trapdoors/down.js
new file mode 100644
index 0000000..a38b70d
--- /dev/null
+++ b/dev-assets/doodads/trapdoors/down.js
@@ -0,0 +1,55 @@
+function main() {
+	console.log("%s initialized!", Self.Doodad.Title);
+
+	var timer = 0;
+
+	// Animation frames.
+	var frame = 0;
+	var frames = Self.LayerCount();
+	var animationDirection = 1; // forward or backward
+	var animationSpeed = 100;   // interval between frames when animating
+	var animationDelay = 8;    // delay ticks at the end before reversing, in
+	                            // multiples of animationSpeed
+	var delayCountdown = 0;
+	var animating      = false; // true if animation is actively happening
+
+	console.warn("Trapdoor has %d frames", frames);
+
+	// Animation interval function.
+	setInterval(function() {
+		if (!animating) {
+			return;
+		}
+
+		// At the end of the animation (door is open), delay before resuming
+		// the close animation.
+		if (delayCountdown > 0) {
+			delayCountdown--;
+			return;
+		}
+
+		// Advance the frame forwards or backwards.
+		frame += animationDirection;
+		if (frame >= frames) {
+			// Reached the last frame, start the pause and reverse direction.
+			delayCountdown = animationDelay;
+			animationDirection = -1;
+
+			// also bounds check it
+			frame = frames - 1;
+		}
+
+		if (frame < 0) {
+			// reached the start again
+			frame = 0;
+			animationDirection = 1;
+			animating = false;
+		}
+
+		Self.ShowLayer(frame);
+	}, animationSpeed);
+
+	Events.OnCollide( function() {
+		animating = true; // start the animation
+	})
+}