Version 0.12

New heroes added.

Remote Bomb

Spring

Scissors

Replicating Robotnik

Android 35

Newton

Boo

Flame Thrower

Moving Thwomp

fixed a bug where entering boss fight mode would permanently activate it.

fixed a bug where the prince's attached enemies could be destroyed outside  of level boundaries.

optimized the practice mode hero selection to be less laggy.

Increased the run speed of the hero: Runner by 0.1