Move the mouse to look left and right. Move forwards and backwards with W and S. Press P to show some sliders. If you hold E (easy mode) at the start it will show your starting location. If you hold Q (for hard mode) instead, it hides the map and disables your compass. (Holding both will just put you in easy mode due to the way I coded it.)
I made the walls more noticeable and I have changed some controls to make them more ergonomic. The maze is also entirely different, although it was not designed by me. The 3D engine was not made by me either. I added music from the sound library. There is now a compass and a visible minimap, but you can hide them if you so desire. Higher quality = lower framerate