A very promising teaser/demo.
Just played through the teaser and it was exactly what I was expecting, a 6DoF game just like good old Descent 1+2.
Firstly, I've no idea what Munkee79 was doing, going by their review. The default settings for brightness were fine, both in the menus and the game itself. The only settings I changed were going from windowed mode to fullscreen mode, turning on vsync (as with vsync off it was making my GPU fans go quite high - personally I'd prefer a framerate limiter rather than using vsync, but as this is just a teaser I didn't take the time to find one to use) and then turning off the mouse Y-axis inversion (as this is how I prefer to play these kinds of games).
The tutorial level is very small and covers the basics of movement, primary and secondary weapons, secret walls/rooms, energy recharging rooms and security keys (there is one key and one locked door). Then it was on to the outpost level, a short level designed for this teaser. It is the basic Descent type of level where you make your way around the mine/facility to the reactor, which you then destroy resulting in a short time limit to reach the exit before everything blows up. Both of these levels are so small that I never even used the holographic guide, though I did use the 3D map.
Lastly, I then tried the challenge maps (two are provided with the teaser). These are small deathmatch maps where you fight against unending waves of enemy bots until eventually you are destroyed, with the goal being to get as high a score as possible. Along the way, as you kill enemies, you'll unlock upgrades for your weapons and sometimes pickups such as invulnerability and a cloaking device.
The graphics are great, the sound is fine and the controls have plenty of customizability. The only issue I had was with the mousewheel for switching primary and secondary weapons as sometimes it would take multiple clicks to switch them and at other times only one click.
I'll definitely look into getting the full game at some point.