Thank you for the comment! I have now made these changes and hope it makes the game better to play. This is just one of many short projects I'm working on to learn Godot, so I wanted it to be short and just try something out, but I have added some more upgrades to make the game a little longer too :)
If you have time, do you think you can check out my Badgen Clicker game? It's a very basic vibe-coded idle/clicker game that my brother and I made a while ago; my brother technically only added like a subgame and a few small things that I can't recall off the top of my head.