It was tough to find the diamond. I'm still not sure where the little fellow came from. :) Seems like iron and gold are difficult to find too, but especially difficult is the flint/pick needed to mine them. Late game felt like I always had a surplus of stone since I was fishing for the pick. Couldn't finish it in the time I had, but I got a bright glowing altar, so I guess I might have been close...
Cool chill game, and kind of awesome how many little critters can be running around at once. Looking forward to a full game one day!
Also, clicking and holding can be tiring on the mouse hand... Maybe consider some other way to do click and hold as well? Or perhaps an upgrade for it after the game gets going, just to save the amount of time doing it. ;)