This is really cool! I like the paper art style, and spamming bullets everywhere is fun. I was skeptical of the movement mechanic at first, but it turned out to be a fun challenge.
One small improvement I would suggest would be to have the UI buttons light up based on which attack is currently selected, so that it's easier to be sure you have the right one equipped.
Great job! If this is your first completed game, that's very impressive.