It looks like the developer focused too much on the animations and didn't care one bit about the gameplay.
There are games from the 90s with better hitbox detection.
All enemies have preset patterns that never change - once you fought an enemy once, you never see it do anything new.
The gameplay consists of short levels where you kill enemies by using the same two buttons (jump and kick). There is a mechanic to use items, but they're mostly useless; for example, you can use a pipe, but it's disabled while jumping, so you end up using kick anyway.
Every third level there is a boss fight. Much like any other enemy, the boss follows the same preset pattern throughout the entire fight, and as such they present no challenge whatsoever.
I don't even know what's the attack of the second boss, because you can stun lock it by jumping and kicking until it dies.
It's basically Mario Bros for NES with poor controls and comical guro graphics.
I'm giving it two stars because there's plenty of animations, but other than that, the game doesn't offer anything.