I really enjoyed this! Most of what I'd have to say has been said, like great pallets, good challenge, fun gameplay, nice art style.
My only real complaints are the momentum continuing after respawn: mostly cause it would sometimes send me backwards repeatedly if I hit a skull for example, or just send me off the side of a bridge.
And I think the skulls LOS seems weird? I thought staying just over one block kept you from their line of sight but that isn't true from every angle? Also them sometimes spawn killing me because I'm just barely high enough? As in (hard mode) I would respawn on a bridge, and if I was just high enough on the Y axis a skull could see me, and move slightly down it wouldn't., also if I went around the left side of a skull it was less likely to see me, it seemed.
Overall love and would play again!