So I did not get a chance to play this one during jam and I am really upset about that. I love this game. Smooth simple concept extremely well implemented and love the graphics and audio. Only time I felt frustrated (not just bad) was with the size of some of the springboards, a few of the actual corridors that you can spring down are very narrow but the springboard was quite wide and allowed for a lot of "accurate" jumps that then proceeded to bounce you into death. The speed of reload made that headache minimal though. I would also just check, it felt like a couple of times I shifted very quickly to a faster moving ring with a very tiny response gap (aka asteroids coming up very soon), if that is the case (and it wasn't just me not watching closely enough) I would try to shift the camera angle to telegraph that a bit more. If your choices are instant reaction or death it's usually good to know about that before you have to restart the level when you are on the last ring :)
Definitely needs more levels and this could be expanded upon, there are tons of other mechanics you can add in this, to shift his direction similar to but completely different from the springboards.