Save planet. Build canons to stop meteors and enemies to destroy planet.

Controls

W,A - rotate planet Canons fire auto. You need only build specific canon in spot. Also canons have 3 upgrades. Survive waves of meteors and enemies.

Sources: https://drive.google.com/open?id=0B69Om7dkNUEhTHNvMzVSRDRGNWM

DownloadLink: https://drive.google.com/open?id=0B69Om7dkNUEhQVlyT3FoTVA4aUk https://kensou.itch.io/cosmicplanetdefender - Alternative