Quite an interesting game. First thought with all of the wording on the various pages it was a little overwhelming, but at least it all made sense.
I haven't had any problems with the saving process as of yet... and it plays smoothly for me.
Nice style, I like the little icons for the ores, tools etc.
I am left wondering why I am clicking random moving blobs as 'mining' though and I wish it had a little more to it, say, 'random dragon attack'. None the less it's a calm play and fairly educational too.