Good, but the game suffers from serious performance issues and not having anything really interesting about it except the main concept.
The main concept was executed in a way that was mediocre, but it reminds me so much of those flashy vertical shooters that I could not bring myself to give it a bad score.
The controls are tight, the graphics are excellent, the music is amazing, but I found it easy to get bored of quickly.
The whole "Scrape bullets to get ammo" concept is interesting, and had a lot of potential. But it isn't exactly easy to understand right away. Maybe that's just be being a dumbass, but this is a review. Not storytime.
Overall, it is a good game, but has a lot of mediocre details in it and it tries so hard to be like many other arcade shooters like, for instance, Frantic, but fails.