Press "Refresh" to create a new deck. Press "View Card" to view a card from the deck (Sometimes you may have to do it twice for it to work. IDK why.). For some reason sometimes you have to be in full screen to see the text on the buttons. Same with the text on the cards. If you are looking to mod this, I would recommend using v2 instead: https://scratch.mit.edu/projects/1159128189 . Why it is better can be found in the notes and credits section of that project.