This is a really fun and unique game! I liked the particle effects that would come out when you shoot the different ships, it really made up for the audio. The gameplay loop of getting upgrades is really fun too! Overall, amazing job :D
Yes I love the particle effects too. I'm quite sad I didn't have time to add audio and more particles, I think it would have made the game 10x better. (Not to mention the balancing being... erm... yeah). Thanks for playing!