I wanna start with the positives. The game feels really fluid (heh cause its paint) and handles really well. I like the aesthetic of the whole demo and see lots of ways to expand the premise. It feels a lot like other platforms but feels better then most (on part with Celeste and Hollow Knight)

Now the critics: It might be because this way a demo, but I got stuck for a very long time on the final Heart Piece area. There are very few checkpoints in that area, and it requires exact timing on many of the jumps (the first pinwheel platform that's inside of corruption I got killed in more then once because the corruption came back before the pinwheel cycled up). Not suitable for first level platforming.

In general I think the teaching tools of this game are somewhat lacking, its not always clear what your supposed to do for some of the platforming. I think starting with the dash might be a mistake, as I don't even really have time to get used with the jump before I'm asked to Jump-Stab-Dash-Jump-Jump-Stab-Jump (and on many of these there is no room for pausing or flexibility in what order you have to do the sequences, basically making it more memory then skill).

Most of my criticisms boil down to "requires too much precision for this early in the game". But again its a demo, so this might have been limit testing

The only out and about unintuitive thing was that my basic attack doesn't have an up/down variant, but my stab does. I very much feel that the basic melee should be able to input up/down.