I'd probably never think about developing a mining game from this limitation. It just didn't come to mind, which makes this very interesting to me. Thinking about it, I guess all idle games are really just a game where you're stuck in a loop of building your economy until you reach a point where you can't even count the zeroes. Cool stuff! I loved the idea of making sure that there is enough gas to get back up, get to the shop, and buy more stuff. It's simple and fun for sure.