Hey!

It looks like there are 10 hidden heads. You can activate them by shooting them with your rocky pal, when it is in the 'blue form'. I don't know what happens when you activate them all, I will update this guide with any new info.

I did two playthroughs, and found 7/10. Just wanted to make a quick guide to gather them all, since I don't feel like exploring the map more at this time.

Please let me know if you found any of the missing 3!

Not too far from the beginning, you will come to a closed door, that can be opened by going in the side areas and solving puzzles there:

1: In the left side puzzle area


2: In the right side puzzle area


In the castle/tower area:

3: When you go up the first elevator


4: After you break the second wooden wall with a ball


5: When you step out of the tower to go up the stairs


6: Close to the big crystal


7: Even closer to the big crystal

If you have any questions, suggestions, criticisms, found any mistakes and so on, please let me know!

Thanks to the developers for making a good game and thank you for checking out my guide!