Did you force filtering off in your video card drivers? Because it looks like you don't have texture filtering. We have filtering on in import options so this is not a problem with our game. Please check your system configurations.
Viewing post in Lavakinemat Inc. jam comments
I'm sorry I've got the wrong impression, but still, I cannot reproduce this on a normal environment.
EDIT: This bug has been fixed in the latest builds: https://aemetta-toasteater.itch.io/lavakinemat-inc/devlog/82123/fixes-to-windows-specific-bugs