Love the art style, and the idea.
Not a big fan of having to install the game maker.
However, sometimes the controls were a bit weird, I think there were maybe too many options bind to one key. And sometimes after defeat the enemy character starts the round by laying down.
But overall, the idea is solid, and the art style and animations are great, the gameplay a bit wonky at times but for the restriction of the one button, I think you did a great job.