Demo Update 13 - Minor Balance Changes & Bug Fixes

Build 13 has been released, bringing in some bug fixes for the demo as well as some new features: * Balance: Freeze no longer stops enemies from moving, but reduces their movement speed by 50% (stacks). * Tweak: Frozen enemies will now appear with a blue filter on their sprite. * Tweak: Enemies will now prefer to avoid passing through placed characters. * Fix: Various bug fixes from previous version.