-Nerfed AOE based abilities
-AOEs now do less damage
-Enemy speed penalty reduced when freezing
-More upgrades required
-Max AOE range lowered

-Fixed key drop rate
-Fixed double XP glitch
-Fixed enemy timers not resetting
-Improved enemy distribution on Double (more work needs to be done)

TODO:
Add new enemy types
Improve enemy wave distribution
Increase max rank and add new upgrades
Further balancing reworks
...and more!