Cool game! It made my evening :) Yes, the final boss a little bit hard, but I think this is ok! I tried 20 or maybe even 30 times when I finally did it. You should get boss tactics and when you get it it will be not so hard to go throu. So, I like your game very much, Friendly Cosmonaut and Scary Moonchild!
PS: The final titles made too fast IMHO ;-) I wanted to read them, but couldn't :)