Nice to see the progression of the development over time!
Controls are fluid, artworks and animations are absolutely fine and I appreciated that there are new animations/art since the last demo.
I haven't encountered major issues. A very minor thing I noticed is that when you go to the next stage, if your healthbar is not full it triggers the healthbar animation just as if you get hit. It's a bit scary when your healthbar is low but has no impact on actual gameplay.
I found it slightly hard to kill enemies without getting hit at first playthrough. Maybe I'm just bad ( that's a serious option :D ) but when I got my attacks buffed with powerups and was able to kill enemies in just two hits the difficulty felt just right.
Regarding powerups, I was barely able to pick them up. Do you have to actually press a key to get them? Or can you pick them up just by touching them? And do you lose them when you get to another stage? I felt like the basic enemies were getting stronger from a room to another, just like the powerups were lost after I finished a previous stage.
Nice work overall, looking forward to seeing what's next!