A free program for Android, by Appercode.

Portal Finger Simulator is a very easy and intuitive game. It has a unique and fun physics-based gameplay, where the only thing you need to do is to tap the screen to open the portals.

You can use your finger to open the doors, so you can go through the different worlds and find all the secrets and items. You will be able to do all this with your fingers, and you will not need to use any other tool.

You may use logic to complete the objective in this game by placing one finger against the screen. Your aim is to locate the answers using your fingers and all of the features of your phone.