Thanks! You've got a cute game aswell. I played and rated it yesterday.
Viewing post in Vicissim Towers jam comments
it's not a secret lol. You should try out blender's grease pencil and add the noise filter to it and set its strength according to your liking. Then make an animation of the noise and export each frame individually.
There are a lot of tutorial on this topic on youtube as well. I'll recommend this one: