Step 1: Press Play.
Step 2: Press New game.
Step 3: Press "Auto mode" at bottom centre of screen.
Step 4: Make sure to set up your Panic Button. (Go to Settings>Display>Escape Key Function> set to Panic Button)
Step 4: Enjoy the visual novel Riddle Joker .

Its simple bro. Anyone can play a visual novel. Just don't press skip backwards as it can bug out your game.