Yes, most people get nervous at high altitudes but in VR you get used to it very quickly. I'm afraid of heights in RL but in VR I don't mind falling down from very high altitudes. Somehow this is even fun. You could also lower the fall speed for people who are afraid of heights.
Have you solved the problem with the walls yet? If you touch the walls with the Hitbox from a certain percentage, a certain amount of energy would be drawn off (with visual and audio indication). If the hitbox touches a wall with more than 50 percent, you die.
Still have some strange ideas:
How about a chase mode? A robot you can't kill follows you from the beginning. When it reaches the player, you lose.
Due to the special way of moving in this game, it is not possible to move the game area (unless you are in an elevator). But it should work upwards or downwards. For example, you could make stairs or ramps in the game that move upwards or downwards as long as you walk on them and move. So you almost have the feeling to walk up a real ramp/staircase. So far there are only the elevators to switch between the different floors. Ladders would also be possible. When pulling up and holding with the hands only the height of the playing field shifts. For that you would have to deactivate the falling down of course so that you can leave the area of the ladder when you reach the top.
