You´re lost. Try find the way to the portal with just a flashlight. Controls: Right/left arrow to turn. Up/down arrow to move forward/backwards. L to show/hide level number. Where the light stops in a clear line it is a wall. The rest of the instructions in the game.
Press the logo to skip Thanks to crazylegs66 for 3D Maze Escape (Verision 2.16) for the inpiration.