Thank you! We meant for many of the UI elements to be more legible, but never got to it. Do you have a suggestion as to how to to it? Shader?)
The author of the musical pieces is webik150.
Shaders sounds like the right way to do it, but since I am not very skilled with them (and also it is a jam piece, so there are really not many benefits to doing things the right way), I would probably just get the position of the mouse on the screen, raycast from there to find out if the cursor is over the cloud and if yes then swap the sprite for the white one. Seems like the easiest way to do it:)