Challenge games

Not sure I like this one. There is very little limiting scrap right now - I get excessive amounts, even if I eventually build a fleet out of the most expensive ships on the list. Making it even easier to save up tons of scrap doesn't seem to add anything except possibly a lowered difficulty in the early stages, when you're still scrambling to equip one ship . . . . . and then, only if you have drones or a repair beam.