Sorry about the sounds for the Mysterious man, it seems to be a rather common bug
And about the easy mode: the ony hing it does is doubling your iframes :)
A quick tip about solving the puzzles: your character usually hints at the sulution!
I did see that towards the end, that the character told me what to do. Then I couldn't figure out how to break the sand though :( I'm sure if I kept playing I'd get there.
You have to either cause an earthquake or land a meteorite there :)
