Initially started as the first of many demo games in the Zenva "Godot 4 Mini-Projects" course (link below), but quickly expanded into having many more features than detailed in the original course.
https://academy.zenva.com/course/godot-4-mini-projects/
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Music: Time Travel by Casual Participant
https://motionarray.com/royalty-free-music/time-travel-1989279/