Great use of the theme an limitation! The presentation was great and the gameplay fun and unique.
The one thing I would change is how the player chooses which platforms to raise. I think it would have been better if instead of having to aim at tiles, the player had a marker a fixed size and distance in front of them. Or maybe an arching projectile that raises the platforms when it hits the ground.
The reason for this is that I found myself looking down at the floor for the majority of the time I was playing which meant I had a hard time seeing the enemies when they were raised and crushed.