Nice mechanic, well presented :)
I did hit a few bugs, but looks like you’re well aware of them (48 hours is always too short!).
If you continue to develop it, I think it would be worth exploring more ways to force the player out of the ‘easy’ route of cycling blocks along the bottom; just moving the more challenging ones out of the way; maybe collectables they have to climb for?
I had a lot of fun :D