Alright, anything else you recommend?
Hmm, aside from the basic polishing, increasing difficulty over time, up to a hard but fair/sustainable speed would be good. Some of the obstacles feel a little too close together so the spacing could probably be tweaked a bit too.
You plan on working on this more beyond the jam?
Yes. Yeah, I don't know much about polishing a game
Cool! Well keep it up! All it is, is just playtesting and development until you feel like it's "complete" to you, whatever that might mean.