Here is the link to the player control for isometric tilemap.
Pastebin Link
Hope it helps you :-)
Hey sorry I didn't get notifications for your reply, I just saw your comment.
If it helps, basics controls are covered in the scripts above. For correct path I store the randomly generated path in a vector array ,when the player moved to a block I check if that block is in the array or not and if it isnt (wrong move) I play the death animation.
I hope this is still useful for you.