Oh, yeah, because we totally don't have overpowered AI, paddle speed, and paddle size upgrades, as well as a bad AI to go against. We're totally gonna lose against this oh-so-dangerous foe, and we'll totally get screwed out of our wins and points. Toooootally.
You should also add an easier way to move from instance to instance (maybe use A and D, changeable in bindings?) Another idea is to maybe be able to mute the music or something (or I can just make another song!)
Yeah, the first shop should be cheaper so you can actually buy stuff. Also, two upgrades for the same thing just means you're a little unlucky, don't worry about it too much. Eventually you'll get past first boss, and then you'll have 10 more levels until you fight another boss.
Try this: Spinigun, Ghost ammo, any multishot barrel, any trigger, any stock, and Drunken grip. I got past level 100 with this setup, and I was using the base trigger the entire time