https://github.com/tutsplus/CoronaSDK-SpaceInvaders3 tutsplus/CoronaSDK-SpaceInvaders3 Create a Space Invaders Game in Corona: Finishing Gameplay - tutsplus/CoronaSDK-SpaceInvaders3 github.com https://code.tutsplus.com/tutorials/create-a-space-invaders-game-in-corona-finishing-gameplay--cms-22789 Create a Space Invaders Game in Corona: Finishing Gameplay In the previous part of this series, we g..