This was super fun! I love the art a lot. The different palettes for each level was an amazing touch. The mechanics of the boxes, levers, buttons, bounce pads, etc. were introduced very well and there was no level where I thought it was unfair because I hadn't been taught anything yet.
I do feel that the moving platforms were a bit tedious. Specifically in the final level. I felt like I knew what to do but had to wait for the platform to come all the way back around. Also I had to reset the level a few times because it wouldn't let me push the block off the platform.
I see from other comments that this isn't even that final build. This is amazing so far! I can't wait to see what you do with it. Your other games also look super intriguing, I'm going to go play them now!