Cute game and interesting concept. I love mining stuff. :) The frowny and smiley face when you hang onto the sidewall is a nice touch.
Some suggestions and issues found:
- Have a UI that show how much you have mined.
- Maybe if you cannot mine a node yet because you need an upgrade or something, have a "fail" to hit noise/ animation, like Stardew Valley did with their mining?
- Build the game in windowed mode instead of full screen unless you're super sure it'll work on all different aspect ratios. My husband has an ultra wide monitor and couldn't see a lot of the upper/lower portions of the screen.
Overall cute game and well done! I look forward to seeing what sort of updates you input after the game.