Interacting with the environment
Some objects will turn the colour of your character:
When pressed will show more story
An arrow indicates that you can more further into the environment, showing you to swipe in that direction:
Interacting with other characters:
Characters will light up your colour indicating you can interact:
When pressed your UI handler will appear (your inbuilt computer) show you choices, swipe to make a decision.
Showing text, you can scroll down if there is too much text, and leaves when you click the character:
In order to keep game play simple and to focus on the narrative the user interface is kept minimal but allows the player to easily see the choices available using colour.