XP (Level ups and skill upgrades)
Morale Abilites (Free cooldown, Extra Damage, Lighting that kills all on screen)
Levels (Every ten kills spawn times are faster and the indian speed goes up)
Custom Sound Effects
I'd prefer 8-bit graphics, but if anything then a normal art style.
Controls (Will be explained in game):
Alternate A & D to fire.
Press Shift to use Morale (Click to select morale abilities).