Data Jammers: FastForward Updated

[siosios]

Change list:
- added a difficulty level selection to make the game more approachable to new players
- added a way to track your achievement progress during the game
- added an option to restart the current level
- fixed mouse cursor not disappearing during the game
- fixed spacebar not working correctly in the keyboard setup
- fixed "how to play" not displaying 1000-point bonus for getting all the rings




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