I think the player should be promted to experiment and there should be more ways to escape to allow more creativiteit

Cool concept!

I think it'd help to have a speedometer of sorts and that you can also sprint forwards, sprinting backwards feels quite odd to me since it isn't Super Mario 64 (yet)

I do think it'd be cool to see levels with this concept where you can strategically skip parts to finish the level faster. Generic idea: maybe some racing game?

cool concept, i would recommend some kindoff backwards camera or make it 3rd person. It is difficult to see where you are going. A speed meter might also me usefull. One that indicates when you are going fast enough too break the game.