Changelog:
New chest: Yellow. Yellow chests only contain abilities. They are rarer than green chests and must be destroyed(they are bound in chains) in order to collect the ability.
Enemy collision response has been massively improved. The previous system had issues with enemies bouncing off of each other, or seemingly charging/popping instantaneously from one position to another (many times directly into the player). There were also issues with knocking enemies back, where enemies could block each other, forming an almost impenetrable wall. The new system fixes these issues.