Add image resources and add EggEmitter in menu scene
Add more particle effects
Add level select screen with preliminary 'Play' for now
Add preliminary egg implementation
Add helpers to create the egg and obstacles from JSON
Add list of obstacles
Add goal creation
Got rid of offsets in wall creation, could very likely break things
Revert ac70cb5 and add offsets to goal
Added collision detection and removed physics trait from JSON
Move physics bodies for obstacles back into method, to be changed when it is refactored out into a class