Okay 13#.
Art: 5/10 - I can't tell if you animated the stickman, or actual did a pixel art of the dog.
Music: 5/10 - Weird.
Gameplay: 6/10 - You just gave us 3 weapons, some enemies that respawn after some seconds.
Overall rating: 5/10 - Don't worry, some people did worse then this.
Note: I hope you learned some new things :)