I think this game fits the theme quite well. I am trying to move these boxes onto the pressure plates, but I get distracted all the time by these enemies that fling stuff at me. That and the random spikes that appeared everywhere. I liked the pixel art a lot and the sounds gave me a nice amount of feedback as well.
I liked the game a lot, but I must say I was a little annoyed at times as well, especially at the combination of enemy bullets and random spikes. I went to first kill the enemies to give myself a bit more space to push boxes, but then once I killed the last enemy the first enemy had already respawned. Or maybe you could just have spikes at fixed positions that come out at some pattern?
Overal I liked it though! Great job :D