This is a very well thought out puzzle game, and the levels were intriguing! However, I did encounter some issues when playing it (the WebGL version). Sometimes, when restarting a level, the cubes would not separate, as in, they would respawn already grouped together. Another issue I found was that the 'Lost' UI just didn't disappear - pressing 'R' or'Z' caused it to fade out slightly, but it never went away and so it was always obscuring my vision somewhat. Other than that, a very solid submission! :D