Steer with WASD, aim with mouse.

What you don't see will still hurt you. 

Collect {currency} to create new outcomes.

Observe what happens in the world. 

Update your understanding of the words to increase your understanding of the world.

Some more details about the cards

If you have one card with the text "A B X" and "A B Z" the A and B refers to the same word. As you notice in the beginning of the game you have very limited outcomes, basically "PLAYER BULLET INCREASE" and "PLAYER BULLET DECREASE".  You can now deduce that symbol A probably refers to a PLAYER and symbol B to "BULLET". Now you need to connect the increase to a symbol and decrease to a symbol and then as the game progress more outcomes are added which are a mix of symbols you've seen and decoded and new symbols you need to figure out what they mean.