its too easy, though, you can just buy a few things and hold x , maybe make enemies shoot projectiles, or some stronger common enimies, but generally a great game, love the pixel art, the game is soo polished XD
That's the plan - I'm still toying around with the difficulty, but the first area is supposed to be fairly easy to introduce you to the game - later once you have around 10 health enemies will start doing more damage, be resistant to some attacks and have more difficult attack patterns.
Plus the upgrades at the convenience store will have their cost's adjusted eventually