First Day Fixes and Stamina

A lot of feedback came back after the first release of  the prototype. One comment was how aliens like Stinkfly and Ghostfreak could fly forever. To solve this I have added Stamina. Similar to Protector of Earth actions you make as aliens can drain your stamina, when this reaches 0 you transform back into Ben.

I have also, during my inspiration from Protector of Earth, added in pickups that increase your stats while transformed to allow you to play as an alien longer.

Changes and Fixes
Stamina
Boost Pickups
Diamondhead Shield is now Working
AI can now AIM

More fixes are coming soon along with giving every alien 4 powers rather than just one or two.