I liked the circular runner concept. When you have done a lot of laps it can get a bit tiring, I was thinking as I played that would be cool if the scenario was like a spiral staircase (but with a ramp, not staircase), and the players go up a tower or something like that so they can clearly see how much you need to traverse to finish the level.
Found it weird that you duck when you press the down key, but to jump you have to let go of the up arrow key. Also, as you put in the description, i couldn't play it more than a few minutes because I get motion sickness really easy.
The second level is much prettier and colorful, you should take a screenshot so you show variety in your jam page.