Definitely neat, and what was there was presented nice. The sound and particles for particles colliding is really tactile and cool! I like sandbox-y type games, but I do wish this had more to play with. There's no goal, which is fine, but if you don't give the player a goal, you should be sure to give them enough tools for them to forge their own goals. The physics themselves feel nice, and could definitely be a fun start to a simulation game, but it needs a little bit more bulk to keep me once I've been drawn in.