this is clearly a resolution problem. i know 3 way for it.
1 - you play game with resolution not compatible to your screen (i dont think)
2 - the custom UI is resized wrong (too big , out of limit of renpy)
3 - the Ui is moved in setting of game (bad scripting from dev) . but i doubt that as only you have this apparently
N°2 would be the reason, but if only you have this, then its mostly the number 1. check wich resolution you play the game compared to your screen.
![Unsure :unsure: :unsure:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
also, check if you play fullscreen or not. seems like the game UI is set for full screen and you play windowed.