As simple as the concept it, it definitely fits the theme and felt fun to play in. Typically this style of game is played as a twin stick shooter meaning you can shoot in any direction not just the direction you are facing. I don't know if this was purposefully designed to make it more 'out of control' but adding in twin stick controls would make the gameplay a lot smoother.
There is also a typo in the tutorial, one of the sentences says "knwo" instead of "know", other than that a solid entry!