So I have been eyeing this game for a while because I read a couple of descriptions that said it was like a Metroidvania with crafting. I was playing Stardew at the time.
Is this game like this? Can someone give me like a brief overview of what it is like to play the game? Are there a lot of power ups? Is the mining fun and serves a purpose other than getting stuff for currency and selling?
The game is about digging, exploring, upgrading, platforming, bosses, puzzles, etc.
The main gameplay loop is dig-sell-upgrade and the gameplay loop is really tight. There are a large number of things to upgrade to, and you can transfer the upgrade cogs to the things you need most. There are 2 different teleport systems, one "fixed" and one more flexible through upgrades.
Along the way in the underground you'll upgrade to new powers in a metroidvania style. But don't expect a pure metroidvania, because this is a game of its own.
The mining is about exploring, more than selling IMO.
Edit: Never played the first one. Do I need to? I was planning on doing it on the Switch ads I wanted a handheld game.
No, the protagonist in 2 looks for the protagonist from the first game. That's all you need to know. I would skip the first game, since 2 is so much better in every way. As I wrote in a reply above. The 1st game is fun, the 2nd is a masterpiece.
If you play it handheld, make sure to use earphones to hear the brilliant music/sound design.