Very cool concept! The risk concept was pulled off quite well, you do really feel the lack of speed at the endgame, if this game was expanded on so that once you exit your coins could be used to get tools or upgrades I think this would be a very good game, you'd have a greater incentive to risk it for the last few coins but also have an easier time if you had gotten some upgrades! My only complaint would be having some better feedback when getting hit, it wasn't easy to tell if I had I-frames or not and my hitbox felt larger than it should've. A really cool game though! You've definitely got an idea that's both fun and could be expanded on! Good work!