Removed clock, used stopwatch
Modified README after stopwatch change
Made Game a separate class, makes testing simpler
Added enum for test stage
Fixed test stage
Fixed == instead of = bug
Implemented use of verticesNeedUpdate
Made particle count dependent on LightningField area
Added encapsulation to Game, making things private
Removed unused stopwatch from game.dart
Added done getter to game, might eventually make it extend animation
Made playerFromMap a factory constructor
Made Game implement Animation and restart on finish
Moved general textures to general-purpose-textures