Didn't play much, it's a bit too flaky for me to enjoy it, but pretty good for a prototype I'd say.
First thing I noticed is that the vertical movement is sluggish. The walking is smooth, but as soon as you jump or fall, it feels slow. Might wanna fix that.
Second thing I noticed is that the music in Spired Wastes (or something) is crackly. With every bass it crackles.
Enemies also jump around weirdly, also ending up in walls.
These are my remarks based upon my first 3 minutes of play :-)