Thought it was a crappy game with ads at first, but it was surprisingly fun

It's a common type, but as you clear stages, you can upgrade previous ones, and it starts mining, transporting, and selling automatically. Once money starts accumulating passively, it gets kinda fun. The first few stages might be a bit stressful. The ads are still frequent, but I play it once a day for a change of pace and to complete quests.