Awesome art style that definitely stands out, as I notice it from week to week.
I really like it, the animations are smooth and the gameplay is quite enjoyable, I loved how the player looked more 'traumatised' as the levels went on.
I think after the boss, although not necessary, some indication as to moving on is needed as I was just waiting thinking it needed to load. Likewise with the death to the left, although you'll find out very soon if you just leave it to consume you, or you run into it yourself, something indicating death would look nice I think.
P.S. I suck, I couldn't get past the 3rd boss.