Space Wars Survivor

You are stranded in an recaptured alien ufo from way back. You are one of the last mankind survivors which know how to pilot this ship and your job is to survive and eliminate as many aliens as posible to save your planet... Also you must collect all or as many coins as you can to access permission for teleportation to the next level you need 230 score an 40 coins to pass level 1, 530 score and 80 coins to pass level 2, 800 score and 130 coins to pass level 3, 1050 score so 190 coins to pass lev...