Gem Excavator

Gem Excavator is a casual digging game where you try to collect as many gems as you can on each level. To do so, you'll have an excavator at your disposal, which can go in any direction and can even fly. That said, you'll need to refill its tank from time to time. If you run out of fuel in the middle of the level, the game shows you an ad and teleports you to the pump.

There's also a machine that you can use to exchange your gems for coins. There's even a section with upgrades and improvements for purchase, which includes more drilling power, a larger gas tank, and the option of adding auxiliary drilling robots to accompany you like dragoons.

In addition to gems, you can also find TNT and gasoline in the ground. Gasoline fills your tank, whereas the TNT explodes, breaking up the nine adjacent squares of dirt. Before you can take advantage of either one, however, the app shows you an ad.

In order to advance to the next level, you'll need to make it to the bottom of the map and tap on the part that says 'unlock.' After you tap it, you guessed it: the app shows you an ad. After that, the ground will break open, and you'll fall into the next level.

Gem Excavator has quite a few ads which are shown when you refuel, update, or simply exchange the gems for coins. Nevertheless, when you download Gem Excavator's APK, you're guaranteed to have some fun.