I played for 45 minutes and never made it to the 3rd room.
10/10, would bonk again.
In all seriousness, this game's level design appears to have no difficulty curve. It's just a high, flat difficulty floor. As a result, I think it destroys potential attachment for new players. Generally, you want to start out easy in order to get most players invested, then hit them with the tough stuff after they've gained some false confidence. Just a thought.
I have no reason to continue playing, but I could see this bonk gimmick, as simple as it is, being used as the basis for a more refined rage game that stands up to the likes of 'Getting Over It' and 'Jump King'.