Admittadly, i have a very addictive personality. I have never been addicted to a game this bad since i played Field Runners on my iphone. My play time since ive started playing this game is only limited by my battery life. But i have since tackled that by playing while its plugged into my pc. The maps are random, so you can play it a zillion ways. But here are my tips: stock up on ladders and the medical emergency thing. Go down the shaft, and grab some local gems, just to build some money to get more ladders and medical supplies. Also buy a sleeping bag ASAP so it increases your stamina. Heres my tip; dig STRAIGHT down grabbing any gems you can without going too far off the downward path. Keep digging until you reach about 50% stamina, then head back up to sell your gems and rebuild stamina. Continue that process until at the very bottom! Once at the bottom start farming around for gems, this is where the most valuable ones are so youll rack up big time! Upgrade to the drill ASAP, upgrade bags and sleeping bag/camp ASAP. If any questions, feel free to post. Try the free version, but be ready to spring for the paid version in about 2 days thank me later.