Gem Miner

Gem Miner sends a small miner with a headlamp tunnelling into the ground. Each square of dirt you dig uses one unit of energy, while walking back through tunnels you have already made costs nothing. Grey boulders cannot be dug and have to be worked around.

Blue gems are worth 10 points each and you also score a point for every level of depth you reach. Green batteries give back nine units of energy, up to a maximum of forty, so a detour to collect one is often worth it. The deeper you go, the more boulders there are and the scarcer the batteries become.

Collect gems and dig as deep as you can. The game ends when your energy reaches zero.