It's my first time seeing this mechanic brought out in 3D, so good job breaking the mold! The models are kept simple (which I like since overly complex can get overwhelming) and the audio fits the ambiance very nicely. It does seem a bit unforgiving with the movement and countdown, since even a slight sidestep can cost an extra step, and I found myself losing at the edge of the exit multiple times. Perhaps there could be a more concrete definition of what a step counts as, similar to how 2D games can have tile spaces. In terms of level design, you did a great job introducing new mechanics to the player, and it had me eager for more complexity down the line.