The spawning of projectiles is a lil off at times, but the core gameplay loop is there - I could see it being expanded on to make it a real quick-reaction style twitchy game. Flipping back and forth to dodge projectiles and pick up the ones you're after is pretty neat - the main thing I think this needs (unless I was just really bad at this, and never found it) is some way to go back to the shop menu naturally when a "run" ends.
The core concept is there, the sounds and music are a bit rough but they all cohesively fit. It gives me the same kind of early 00's era game vibe that stuff like nyan cat does. Definitely has that flash game vibe to it - I could see a finished version of this being a fun lunch-break or mobile game.