So far tested on 10+ different PCs and launches without issues. Try ALT+ENTER while having the screen in focus to retrigger fullscreen optimisation options.
Viewing post in One in the Circlus jam comments
You are right about that! There were supposed to be way more popup descriptions and dialogue quips coming from clowns as well as merchant regarding secrets and game ending. However we haven't managed to iron out the unreliable triggering of them, so in the end, since they sometimes caused funky softlocks, we decided to disable and re-introduce them after the jam is finished. But we're confident about what we did wrong regarding technical design, and will fix that as soon as the lock on patches will be lifted. But yeah, overall affordancy needs to be improved in the future titles. Thank you for playing!