This is a game about running to the finishing line and dodging the walls.
The first character seems to jump at a different pace than the others, so you have to double-jump when facing walls.
I thought the red bar over your head is the damage you took along the way at first, but it turns out to be an indicator of how far you have gone and how close you are to the finishing line.
I am not sure if you can die in this game, it seems like walls only slow you down for a while.