If you ever need to kill time in a short period while messing your head a little the try this one game made by Ateam Inc.
Ellie – Help me out please
Ellie – Help me out please is a horror-mystery visual novel, where your mission is to help out a girl named Ellie to escape a room with puzzle solving games. The visual is quite beautiful with the touch of little animation and voice acting.
Even the controls look simple (all you need to do are tap and slide things on the screen), but you need to think hard and carefully to try completing each puzzles.
The game has two endings : The Bad and Good Ending. If you are not careful enough you can trigger the bad ending right near the end of the game, but if you do the correct things then you will get the good ending in which you set Ellie free from prison.
If you have finished the first game. After that you can access the other one called ‘Another Room’ where you will meet Ellie again in a different room with different gimmicks and puzzles to solve.