Level 15 is just a little bit tricky. Zoom the girl into the staff, and use the rebound to get back to where you were, putting her in that left chest. The rest of the level is simple in comparison.
Using Firefox (game doesn't go past the white screen), I tried clicking on the Game Ark beginning ad. It didn't direct me to a stable site, with a bunch of gibberish on the screen instead.
Excellent game, as always, in the Soul series. I somewhat miss the card battling games and the RPGs that preceded this game, but this is still excellent! There's several sources out there for the kids, including an imgur gallery, so one can easily find them.
If we extend this far enough into the future of these worlds...eventually, the city dwellers scorn magic, and remove any and all the magic buildings in the name of Science! ...and then the Darkness returns and consumes them all.
Yeesh. 42 and 47 were my hardest levels. Moving enemies are easier because there are distinct patterns - and once you've got the energy already for that level, going without dying does become much easier.
Played this game fine on Firefox. An interesting game, though I think for me the most puzzling (so to speak) was level 29, until I did finally grasp the method to pass it. Also liked that one level (don't remember the #) where there was bait for a trap.