I saved this poor diamond on every level!
It took some time for me to grasp how shovel works on the first level, but when I did all was ok. It is coola that you managed to create so many levels. I like how they gradually teach you different mechanics.
I would be good if game will mention apples somewhere. For player to have motivation to collect them. I guess they're for completing levels "100%", but game does not mention it.
Also platforms are a little unforgiving - if I jump 0.1sec after I stepped from platform I will fall.