Really nice - one of the more innovative platformers I've come across this jam. Loved the puzzle mechanics, really nice unique idea. The ending twist scene and animation was really awesome too - loved the music in that part. Collectables are always a bonus for me too!
One thing I wasn't so keen on was the limited range of the jump... it felt quite stiff. I also came across a bug where I'd remove blocks, but a glowing remnant would be left behind and act like a block was still there. There were a couple of levels I had to restart 3 or 4 times due to that bug.
Those issues aside, I think you came up with a great game here!