I stopped playing after the game reset because I died too many times, it instantly sucked all the joy away.
As the main mechanic: I would've liked either a bit more forgiveness with red blocks you discovered or some way to detect them before hand. It isn't fun to finally make a (for me hard jump) only to die to an invisible block.
The game felt nice to control and I liked the simple visuals. So, all in all a nice game, just not for me