Shoot the space junk heading towards your planet. you can buy small upgrades from level 5, but bigger upgrades are available later on (at levels 9 and 19). be wary of buying too many mini-turrets as they can shoot power ups!!edit: okay thanks for all the brilliant comments people, i have now added the following to the game: -the playing field is now sqaure -the junk has been slowed down quite a l…show moreshoot the space junk heading towards your planet. you can buy small upgrades from level 5, but bigger upgrades are available later on (at levels 9 and 19). be wary of buying too many mini-turrets as they can shoot power ups!!edit: okay thanks for all the brilliant comments people, i have now added the following to the game: -the playing field is now sqaure -the junk has been slowed down quite a lot -there are 3 more upgrades available from level 19 onwardsshow less
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