You can find the mossy key by checking the little pile of rocks next to the clocktower. This one: 
I haven't made a discord server for the game, it's not something I'm really interested in doing.
Thats a big help bro, i am grateful that you saved me a lot of time, discord will be cool when this games gets more storyline and a good fanbase, the game is soo good i hope it gets recognition. (Don't mind my bad English)