Hi,
it's been a while since I started to gather various sample projects aimed to help beginners to solve a unique concern in 2D game dev, it's a repository with various little projects showing ONLY one single featured more or less high-level function.
For now, there are: highlight tilemap cell (under mouse cursor), drag & drop (simple & advanced), offline resource (typical for idler when some resources are generated when time has passed), get overlapping area of two Area2D objects and a compass (which can also be used in 3D game by using x/y coordinates only)
It's all => there, go take a look and save a few headaches and time 🙂.