This is a pretty poor game to be honest.
The movement physics are slippery, jumping is too snappy, there's no logic to how you kill the enemies, the visual/aesthetic design is very basic and there's no animation.
There's no instructions in-game or outside of the game on how to play either; I had to guess you moved with WASD or the Arrow Keys and wasted time hitting random keys assuming there was an attack for killing enemies.
There also isn't any attempt to try a distinct mechanic based on the theme.
The menus and the audio are the best things about the game and those are still basic.
You can do better than this.