Secrets of the Solarians

[ESC] Key for Options
(I would recommend doing this from the title screen the first run to adjust audio settings)
WASD or Arrow Keys to Move 
SHIFT to Sprint
CTRL to Look instead of Move
Mouse Pointer to Dig a Diggable Tile near player
Walk over coins to gather
Use Coins (E Key) to give a hint where the treasure is.
Use (SPACEBAR) To Throw Rocks at Crabs to protect yourself.

Currently game prevents you to dig further once Crystal is unearthed. That was all I had time for my own 1-week challenge. As I do more there will be options to continue or credits, etc. I am planning on continuing this