Differ Hall

Differ Hall is a game created by Gunnel Magnusson, which can be found in the Quest. It has 12 levels.

Gameplay
In this game, you have to find all the differences to win, in other words, mark all of the correct blocks. You can tap on a specific block to mark it, and tap again to unmark it. If the marked block is correct, it will stay there, otherwise, it will be automatically unmarked.