Fun game! This was quite polished for the time that it took. Great job.
The arts is simple but nice, the visual effects are fun. The sound effects were also ok, but there could have been more pitch shifting for the most common sounds like the death sound. I didn't like the music quite as much.
On the gameplay side, it was pretty well made. The grid movement and animations were smooth and bug-free. The mechanics are clever. I also like that the levels themselves is a bit like puzzles that are designed, but the enemies actually move in random directions so every time you play it's a slightly different solution.
Overall a pretty solid entry. Good job!