I Did A Cuphead

What is that blue thing, and why is it trying to stomp you and your adorable dog and your Cuphead fanfic?(There is a downloadable version below if you would like to play with a controller. I am honestly unsure if the web version works properly, as I cannot beat it with the keyboard.) I was (re)learning Unity while playing through Cuphead, and I began to see behind the curtain of the game. I thoug…