Cool game! Like others had said, it's REALLY difficult. Now, I personally think the issue is not camera nor the controls itself, but that it's incredibly punishing for minor mistakes. If your ball tipped just a bit too far to the edge, you're done for. This is even harder with things like the super tight section, in which any horizontal movement could just finish you on the spot. Maybe add like a double jump that could be performed mid air so the player could correct their mistakes, or if you don't want to go that far, maybe a checkpoint system or coyote time, basically anything that could help the player with small mistakes maybe could make it easier to enjoy. Of course, this is just my personal thoughts so take it with a grain of salt (I get that a checkpoint system might mess with the battery life system, so yeah). Either way, still an interesting concept and presentation. Nice work!