Got all the coins, too bad there was no medal for this hard achievement. I picked up all the hard coins from spiky undergrounds first and left the easy surface coins last to achieve that. The idea behind this game was fun and interesting for a short time, but would obviously get annoying fast, it’s a good thing that the game is short. Not sure if intended or not but the character’s jump was unintuitive and hard to execute - that added a little extra level of annoyance.