Took me an hours something to beat, my brain is mush.
There's a couple of times where blocks clipped with the terrain:
The gold button seem to only works if you slide the block horizontally, a couple of times I rolled the block gold on top of it so that cubito was on top of it and the button didn't trigger after letting go.
This one time the game let me roll where I shouldn't and I got stuck in mid air.
Usually puzzle games would have a gentler introduction, level 1 is really long and you can easily fall back to the beginning, but if this is meant to be a rage game then it works. That one path at the end of rivers of blood got me good.