This felt really solid. You've got all the right pieces for an endless runner. Like Obstacles that would make sense for a small robot, ever increasing speed and energy demands, and some simple yet cute artwork.
The only noteworthy feedback I have is that the camera angle could be a little higher. That way you could better gauge distance between obstacles and battery pickups, along with allowing you to see more upcoming objects and plan out your route.
Otherwise I thought this was really good. I could easily see you expanding this into a fuller game and releasing it on Mobile. You'd just need some extra levels, more obstacles, and a little story and you'd be golden.