I tried to replay it, but when I got to a room with 3 ‘bosses’, I couldn't defeat them in any way. It is possible that I was inflicting damage on them (or not) but the important thing would have been to give feedback to the player in real time.I realised on replaying it that neither the simplest enemies nor the ‘bosses’ actually damage me even if I meet their attacks, I don't know if this is intentional.
Graphically it's nice, you can tell it's handmade (that's good), as are the animations.
I'm a bit dubious about the level design, but I don't think I can speak as I'm neither a designer nor a design expert, quite the contrary. ;P