On 1.6.9.36 for Nintendo Switch, interacting with the Junimo Cart arcade machine (both the item and saloon) after you choose either standard or endless mode, the cursor stays on the screen. It's near the bottom middle/right, if you can't find it.
When you beat Junimo Cart for the first time, you get a letter the next day saying you are the first one to do so. Is it the same for the other players when they beat Junimo Cart or does it say "second", "third", etc for them?