Just to get them out of the way since they're running out of time issues: if you do end up adding a tutorial, I recommend making an interactive one rather than a text one, that will give the player a chance to get used to the movement and personally try out they powerups. Along with that, make sure to add a main menu. Moving on from those, I liked the art style of the game but it could definitely use some "juice" to make the game feel a bit more alive. The gameplay was pretty fun as well but It did still get a bit stale after a while, the powerups made a bit of a difference but I otherwise just kept doing the same thing. Overall you did a good job!