A free app for Android, by Varisoft Co.Ltd..

Knock Knock Run is an exciting action game where you have to find a set of keys. Each key will open a different exit door. You have to move through the various levels in order to find all the keys and open the exit doors. In order to open the exit doors, you have to use the special items that are available in the game. You will also have to face the ghosts that are waiting for you in each level.

The first key will open the door, and as soon as you find the key, you will be able to open the door and go through the level. The game will be easier if you are playing with a friend, and it will be harder if you are playing alone.

You will also have to face the ghosts, and each ghost will have a different ability. You will need to use the items to get rid of the ghosts, and the more you use the better you will get at killing the ghosts.