Thanks a lot for checking the game out!
Since it was built around already existing Unreal functions, it didn't take much time at all. I'd say the coding took a total of 2 weeks. I made it for my first Unreal assignment. Where we spent 2-3 weeks learning Unreal and then had 3 weeks to each make a game.
(So the first 2 weeks were primarily focused on coding, while the last week was used for level building and VFX.)