The minimap was a fun aside, its relatively simple in construction at the moment, just a big orthographic camera that can only see certain layers (minimap-visible and the terrain) that outputs to a render texture which then can be put on the UI as a Raw Image. Can be performance-intensive if you're running it at a super-high res but it conveys most of the necessary detail as it is. Also, the physics are the fun of it! Unity's physics engine is really fun to toy with for jam projects as it can create something either satisfying or funny in really short time. Glad you enjoyed the game!