Fun little game.
I'd like to see future updates.
I'd like it more if you didn't have to restart the entire game when you die though, should be able to collect money for more upgrades so you can get further.
Keep up the good work.
Reviews for "Planet Defender"
Nice game, but there should be healing items or a method to heal oneself.
Third cannon upgrade is really bad idea, i didnt survive wave after that upgrade.