I accidentally did it because I wanted to resize the Windows partition but KDE partition manager failed and it corrupted the filesystem. I wiped the entire drive and now I use it as a Steam library. I don't even regret it, my setup feels clean now and I have a ton of space for games
GBA expert here: it looks like that the sprite attribute that determines the sprite shape is incorrect: it is simply set to "wide" instead of "tall"
EDIT: maybe there is also some corruption in the graphics
I've been using Debian unstable since 4 months and I never got a kernel panic. The biggest problems I faced was with the Nvidia drivers but I learned how to deal with it (by not using the drivers in the official repo)
This is exactly why I switched to the "native" client