Really enjoyed the gameplay! and idea was really original and worked really well. Had a few small issues with camera zooming in and kinda getting stuck zoomed in, think it was caused by me aiming and dodging right after each other, unless it was meant to just zoom in for the boss fight. The boss fights were cool, the movement was a little tricky to do when I wanted to shoot as I would be constantly moving towards the boss that would damage me, not sure if there was a way to stand still but I would have liked to not move towards the boss as I shot him.
Also think the way you displayed the tutorial was really cool and made it part of the map. Overall felt like a really well polished game. Good job!