Can you say... 8s?
I liked it! It had the most important attribute of a good game: it kept my interest. I scored a 1390 - for some reason the submit score button wasn't working for me. I dunno if that was just cuz of me or if it was happening to others as well, but you might wanna check in on that. Try expanding on this premise. Maybe different levels have different backgrounds? Or weapon upgrades? Possibly install some bosses at the end of each level? Just some ideas to think about. Overall, it was an above par game and I had fun playing it. I'll be waiting here for your next game!
8/10