I've searched every nook and cranny, but have been unable to discover more than ONE clue/number for the chest... where are the other hints? Or can someone just tell me what it is so I can continue on with the game?...

For whatever reason I'm stuck with what to do with the shovel and now I'm wondering if that old guy with the green shirt is somehow bugged for me soooo I'm looking for the dev since I don't think someone else can answer that xD But feel free to help if you can xD Anyone knows the dev's e-mail or a solution to this or they at least answer to steam posts?...