Congrats on finishing your first Godot project!
It's hard to finish a game in only a few days but you did it! The premise of the game reminded me a lot of chaos theory.
The game did get a bit predictable though, as I was able to find a pretty consistent position to click on the screen so that the balls would always fall into the leftmost target. I think a few things that can make the pattern of the balls more chaotic can help with the premise of unpredictable events. Things like moving bumpers, bouncier balls, spinning elements, etc.