Pretty good game if you're into digging or mining games.
No intrusive ads, and no pesky energy system. You can do as many runs as you want and the game is very generous with gems and diamonds (in game currency)
However by the time you reach the third tomb you'll be needing an unholy amount of gems to upgrade your gear and it gets extremely tedious to dig through because each dig eats at your health and it's too big if a chunk by the third tomb so you can dig about ten tiles of brown dirt before you die.
Edit: movement can also be very clunky sometimes, forgot to say.
Worth playing, just not worth it to spend rl money in it to advance.