Thanks for your feedback, I'm glad you liked it. I will try to give a somehow more helpful guidelines to the game. To follow up on your question, your energy starts to wane when you go underground. To recharge the energy you have to go back up to the sun again. But thats not the only way to rechange the Energy. You need at least a quarter of your energy left to light a torch. That's going to take a little bit of your energy away. But the newly lit torch is then a kind of checkpoint. You can then just stay near the torch and the energy will recharge. That way you don't have to keep going back to the surface to recharge. I hope that was somehow helpfully expressed. And thanks for playing :)