A triangle-y twist on a classic game

This was a game I made a couple of years ago to learn coffeescript. I'm still in the process of cleaning up the code, as I've learned a lot since then.

To play, go to jmdx.github.io. Warning: music will play. The controls are the arrow keys, with the up key for rotations, the X key for vertical flips, and the Z key for switching the direction of "gravity". Enjoy!