I may have run into a bug, I couldn't seem to drive up/down but I could move back and forth. Jumping felt pretty float-y. The background is cool but a bit detailed/crisp for N64 (not that I can talk based on my entry's graphics :P).
up you can only jump. ok, the jumping would be better with sinus. i wonder about the graphics, yesterday told somebody, that the graphics are not detailed enough for n64
