Continue to implement test level game and controller. Implement tape parsing and logic.
Remove save level overriding in test level controller in order to enable saving levels even though the create level tool is not done yet.
Add a 'c' shape level.
Throw an exception when trying to normalize a nul vector. Catch exception in method that compute shift vector that enables to render split polygons. Add a shortcut to translate polygon method when direction is a nul vector.
Remove every level to create serious ones.