Thank you so much!
Yeah the random encounters can be a problem. There will be a few ways to instantly remove fights in the next demo. ^^
The power orbs are hidden in several places. One requires you to solve the purple totem puzzle, one is at the very end of the ocean dungeon, one is received after completing the sandcastle, and the last one is obtained after solving a mana shard puzzle, the one with several solutions found after falling in the ocean's 1st floor pit.
There is a full walkthrough here, if you want : https://www.patreon.com/posts/walkthrough-by-33962675
Thank you again! ^^