Challenge update :: General improvements

Another update to A.I. Space Corps adds a new challenge and improves some previously released missions.

"Astro Invaders" is the name of the new challenge and as the name suggests íts gameplay is mainly inspired by classic arcade shooters like Space Invaders! Defend giant space cruisers while piloting through a dangerous asteroid field. New dangers await on this challenging highscore hunt! Once more we also improved the existing content based an the opinions our players voiced! Some new, slightly more intelligent enemies are approaching the Sinae system. But mankind won't fall behind because new weapon upgrades are also scattered around space-time! The A.I. Space Corps Team