Thank you for such a great and long review! Adressing some things. The falling only happens if you step (or get pushed by the wind) into the hole or you lose balance on the ladder. For the checkpoint they are there however i think ive made the first one a little bit too far. Basically every camp you encounter is a checkpoint and from the menu if you hit continue you will start from the furthest camp you have reached in your previous run. The balancing is distracting, but that was kinda the aim I wanted the game to be a little bit harder. I agree about the ui it is disorienting, but you should really only worry about the energy on the right and the energy drinks (when you hit E) replenish 1 energy. Only later on the oxygen will start to fall and thats where you will have to hit Q to up it. There are some burried bodies down the road :) no dialogue or story thou.
As for your game I thinks the visuals are great, for the gameplay I would explain what the brain throwing does, and maybe make the car accelerate a little bit faster, it feels really slow and heavy especially with the events slowing you down. The wobbly tires are really intense couldnt drive at all when they came up. And the loose condition isn't really explained. Overall I enjoyed the controls and the driving would have been great if the car was accelerating a little bit faster. Feels great and looks good!