Though short, it's a really nice and complete entry. Love your pixels. Really enjoyed the last stage - I think puzzle games need more boss battles. I may have misunderstood what I was supposed to be doing, but it felt like it wasn't always registering the blocks on the targets for the final battle. Sometimes it would cause the boss to lose "hp" and other times it wouldn't - again, may have just been me doing it wrong.
Also, I didn't read the instructions, so I had fun trying to get out of that "The End" screen. For those that come after me, you press "P".