This game was fun. The theme is well incorporated. It is funny though, the red blocks are health, but it is better to avoid picking them up, so it became an extra challenge instead. Really interesting twist.
Usually when I play these kinds of games, the enemy follow a pattern, going back and forth for instance. Your AI was actually unpredictable, which is something I enjoyed. I had to outsmart my opponent.
Good job creating this within 3 hours (plus 10 minutes).