I think I have a sense with what might feel wrong. This is a precision-heavy platformer, so it's very important that (i) I can trust the info on the screen and (ii) the character completely stops moving when there's no input. At the 2nd level after the tutorial where there are singular blocks to dash over, the character slid down from the corner of a block several times. Spike hitboxes felt bigger than spikes looked, while borders of the blocks felt smaller than they looke.