Playing campaign mode I got a ship "Upgrade" for 2000 credits. Now I got a game over, and "Upgrade" is available for 2000 credits again. Looking at the shop, items like Extra Life cost as much as ...
So in campaign I'm getting some credits to buy upgrades and stuff, but I don't know what affects how much I get per level. Do I get a set amount for getting so many stars? So many points? If it ...