no ores to mine load in the browser version just chests and a big empty map
this explains why I was just walking around a whole bunch of empty caves... I was very confused!
edit: from looking at other comments, I think it's these bits that are for mining:
I can't do it though as I don't have a pickaxe and haven't been able to find more than two chests after wandering for about 15 minutes :(
