Got to the boss several times, but I couldn't beat him. Decided to stop there since I was starting to tire of redoing the same challenges to get there.
Things I like: Visuals and shaders are great to look at, they fit well into a cohesive aesthetic. Sound is nice, I like how things seem quieter with the gun held down. Kinda reminds me of when I would do metal shop. Bullet shell piling mechanic is cool. Wall jumping off of enemies is an interesting idea. Overall gunplay and enemy AI are fun to engage with.
Criticism: Wall jumps on projectiles and enemies felt a bit inconsistent to do reliably. Might just be me though. Destructible tiles are cool, though I think it would benefit from some invulnerable tiles, so it's easier to quickly traverse upwards. Level starts too quickly I think, may be nice to have more of a 'tutorial area' that tries to get the player to engage with a mechanic one at a time with less immediate threats.
So far so good, looking forward to next time.