Unfortunately the game is clearly a prototype. The idea could work, if well balanced. The menu doesn't work so after 10 seconds in, when you get your first defeat, you just can't restart the wave.
Sorry, totally was debugging at the time of submission and just uploaded the full game now! I just had to get it submitted so I wouldn't miss the deadline. Thanks for playing though!
Thanks for giving it another try! I totally agree and I was thinking if I had more time it could have been cool to have a way to restore life by getting a certain number of asteroid collisions.