Nextfest Demo 1.1 Update

List of changes:
- Reworked tutorials on the first map, as well as some layout changes
- Reworked outdoor lighting and fade
- HUD icons for the omnifuel conversions now flash when your omnifuel is overflowed
- Health omnifuel icon flashes at low health if you have 10 or more omnifuel
- Finally replaced the placeholder "Game Over" message!

And a whole bunch of really minor things, bugfixes and balance changes, etc.

This should be the final demo update, as we're now focusing on finishing up the second half of Episode 1 for Early Access!