Thanks for the feedback.
Input buffering and coyote time are things I definitely would've considered adding had I spent more time on this. I made the idea within the first day of the jam but did very little work on it until the last 24 hours, within which time I made just about the whole game.
I get what you mean about the background. I think aside from just slowing it down, an option to disable the scroll effect entirely would've been good to add.
It's 100% possible to get all three abilities in one go, and with some ability location combinations it is required. Though, it is tougher to do then if you're able to get by with only 2.
Could you elaborate on what you mean by abilities not resetting? Not sure what you're referring to there.