Ur objective is simple, all u have to do is remember the doors with circles behind them from each level. Once all doors have been shown, click the correct doors (with circle behind them) in reverse order (ie, last one u saw click first and continue until the first door).
It's a memory game, with some pretty gruesome punishments if u fail to remember!
You will get prize if you win the level, but you will get something bad if you answer wrong! ;D
You can use ultimate skill to show all answers, at the upper left corner.