Hi there! I just want you to know that this got me so hooked, I just spent an unhealthy amount of time trying things out lol. Its a very fun conept for me, and may I suggest, it would be more comfortable if you could place a shape and then rotate it just by clicking it again a second time instead of having to go back and forth between the brush and the rotating tool. First click you place it, seckond click in the same place you rotate it, easy and quick. Also I can imagine different "modes" with different shapes, of course each mode would only be one shape to stay true to the concept. Love it!! And the music was enjoyable too. Here are my little experiments :)