I love the retro aesthetic and oldschool feel here. It feels like a 90s first-person shooter. Is that really so bad it's good? I don't know, but I like it!
I feel the enemies are way too bullet spongey, though, it takes forever to kill them. It doesn't help that they have no pain state and the effects don't make it clear that your bullets are actually hitting and doing damage. They can kill you far, far quicker than you can kill them, which just makes the whole thing feel tedious.
I feel the fish in particular is really overpowered. It's not quite hitscan, but it's fast enough that I was never able to dodge its attacks.
I could never get the hang of the gauss weapon, but I didn't find enough ammo to really get a feel for it.
I made it to the big pool, then I fell off and died.
I didn't see a lot of modifiers at play from where I got to, but the ones I did see (exploding butter, vending machine takeover) were well done.