Lovely game! I really enjoy puzzle-platformers, the simple art style was a perfect fit, made it super clear what was happening and looked super polished.
As others have mentioned, pressing retry each time you die felt unnessecary, but it wasn’t a big deal.
I also put in blocks that switch when you jump into my entry, but your use of them was far better than mine! The introduction and exploration of the mechanics was nicely done.
Great job!