Thanks for the very detailed feedback. The thing is, the levels are hand made on purpose. The whole concept is to integrate the pattern of a level in your muscle memory and try to execute it as fast as you can, to win a medal. And at least with my play-testers, that worked really well, they wanted to play a level over and over again just to get a golden medal with that perfect streak that seems to feel very satisfying. Of course you can complete each level by just spamming one direction, but that's not the point of the game and wont get you any medals.
I wanted to implement level unlocking with medals, but didn't have the time / motivation to do so. I guess that was a big mistake, because players seem to just play trough the levels and... calling it a day, missing the whole "point" of the game, which is to get the best time .