- use the version of audio management which doesn't crash the
application if something goes wrong
- include colour32
- update error management to be more reflective of the one defined in
the template
- modify the renderer functions to be more reflective of the template
- modify the game functions to be more reflective of the template (& use
a more failproof method of initializing)
- add gametime
- remove set_gamestatus logic and just use a run boolean in gamedata
- remove emscripten preprocessors as those haven't really been used
