Man must first find a way into the castle, and then there solve some puzzles. After that it is in the castle continues to solve puzzles.
Most puzzles are made extremely easy (except the runes puzzle) so that the entire game can be easy to play in under an hour.
The graphics may perhaps on a tiny screen look good but from a 7-inch tablet to act clunky.
On a positive note no permissions required except the memory access the game.
NB The game is in English.