This is a truly amazing game! I would even probably pay for this. The unique one-button controls feel strange at the start, but by the end of this game they feel second nature.
I'd say there might be less rage than the average rage game, because there are frequent points that are virtually impossible to fall past, and the controls feel really responsive (seems weird but it's true). This is in no way a bad thing though, because I thoroughly enjoyed it,
The level design and pacing is amazing, and I love the perfect progression of skill.
Probably the best game in this jam I have played so far!