Waste of time
In less than 1 hour I got all my equipment leveled to max and got to the bottom of the dig, then ventured down the tunnel to the end where there's a big door to open with the right amount of material. But all that door led to was back to the top. The beginning of the same dig. There's no other dig sites and no other planets to dig through. Don't even bother buying anything from the store. You can compete the whole dig in a hour or so. Not even good for killing time. Add other dig sites and maybe it will be better. You'll have to add other tools and upgrades too. Once you fully upgrade them all the game is basically over. You can keep playing but it's the exact same dig every time with the same tunnel at the bottom. Thanks for trying devs. But it's not big enough.