I'm in the middle of playing now and taking a bit of a break to start here.
I mentioned some of this while Prozacgod was streaming, and experiencing it myself I'd like to reiterate, there needs to be more player bias. The platforming requirements are TOO precise on this. I'm pretty sure even the minimal input lag from running on a virtual machine made it harder for him.
Coyote time is a must. The dash should probably be double what's needed for the first couple platforms so players know they're doing the right thing with plenty of room for error.
The first couple vertical dashes I failed because I was trying to do them diagonally instead of straight up, a mistake that I think a lot of players would make, and I only corrected because I'd already watched Prozac play further.
But while the in-game tutorial isn't perfect, it's WAY better than I'm used to seeing in a jam game, so good on you for that.
Music is very catchy, I'm getting Sonic vibes from it.