Pretty fun game! The inverted control for the player does add quite a bit of difficulty to it (Not in the bad direction). The music and minor details such as the transition from menu to the playing arena do increase the feel while playing the game. I think there's only 2 points which aren't that decent:
- The text format can be better I think- I would say add a remind at the bottom of the box before a block is about to be instantiated at that spot.
keep up the good work :D