This feels like a very well put together game! Everything from the art to the sounds/music to the game mechanics themselves, all seem like they were made to be together (which of course they were :D) but I think that it's very important for all of those to match up, and they sure do in this!
I found myself greatly favoring the left side, I don't know it's just me or if that side was genuinely easier, but I had a lot more success down that side than when I ventured right. I also found myself choosing speed pretty much every time, which worked well for me. Neither of those things are really issues at all lol, but maybe a bit more incentive to vary the play style would benefit the replayability a little more. I would like to see spring pads that you build/destroy too, I think those are something that feel like they should be in the game but aren't.
Maybe in the future if you wanted to make it a bigger release, different abilities related to the movement would fit really nicely as I feel like that part of the game has the most potential for expansion.
Really good work!