Andor's Trail

I am looking for the heartstone but unable to find it, any help or hint please

Also how do I view the map from within the game ? There doesn't seem to be a way to view the map (unless you see the map from outside via a web-browser). Am I missing something ?

The game is not yet finished, and the heartstone does not exist yet. You will have to wait for it.

In the bottom right corner of the screen there is a small chest (to the right of your HP and level bars). Tap on it. Third icon down (which, appropriately, looks like a map) takes you to the map.