Wow this is awesome, especially for 48 hours!
Love the all the screen effects, especially how it looks, curved, it adds a lot to how good the game looks (especially when combined with the already great pixel art).
The game is pretty frantic and fun, though my one criticism would be that it seems a little barebones, with not too much strategy involved. Though obviously it's a game jam and you've go to keep your scope small so it's just a minor nitpick.
Great job! :D