I'm just going to go ahead and guess that you enabled Shaders or Softening Filter. Not sure how much a screenshot of a white screen will help.
Follow these steps
- Close osu! (do this first before doing anything else)
- Open your installation folder (the default filepath is C:\Users\<Username>\AppData\Local\osu!)
- Find the "osu!.pcname.cfg" file (pcname will be replaced with whatever the name of your computer is) and edit it in some text editor (notepad will work)
- Find the lines BloomSoftening and Shaders, and set them both equal to 0 if they aren't already.
- Save the file, then try starting the game again.
🐻 - As interesting of a title that "Bear" is, it's generally a good idea to provide some sort of description of your issue in the title instead of something completely random.