I love 3D platformers so I appreciate you creating one, and with such a clever concept. This is fairly well-designed, too. My only issue, and it's a big one, is the controls are far too sensitive, at least on my machine in the browser. A slight tap of the movement key moved my character a lot, and the jump was far too quick to be precise and fair. If you iron out the controls, you could have a very fun game here. Great job, though. I find working in 3D very difficult and you seem to have a great handle on it.