I'm happy you found it helpful. I think sprinting wouldn't needed as much if you make players be more on the look out for clues. You know, give them an option to sprint, but make it so they can miss things if they blindly sprint too much.
As for the shaders, you could prbably try to recreate something like Return of the Obra Dinn.
Yeah I had to rush this to get something out for DD.
Yeah, no matter how much time you get, there is still more things you would like to work on. It's good you made it in time