Awesome game, fatal flaw
Very good game, nicely challenging,
But i had all the upgrades (10 raduis, 8 armor, 5 size) and managed to not lose a single live in a level.
Then at the upgrade screen i couldn't select anything because they were all full. You forgot a "You win" screen in the game. Of course the game couldnt progress.
Congratulations on making something unique.