Recently, I've been trying to create a kaizo Bopimo! level. However, whenever I exit the level, EVERYTHING IS RESET. Not only that, but I have no idea how to export the level into a file, let it be a backup or not. Do you have any ways to solve this problem?

if you publish as a free roam the level will be there when you rejoin. But to export your level, go to the button that has a planet and a gear. theres a button there that says "export to file".

Okay, that first part is helpful for me. But the second part is something I can't manage to do. Says that the filename is empty or... something else. Thanks anyways. I will try the first thing you said.

make sure its saved as a .bop file, it doesnt do that automatically

Okay, HOW? If I knew how, I wouldn't be writing this thread!

Name the file [name].bop and it should work. There’s also a purple drop-down list to select what file to save it as

btw it backups your levels automatically anyway, so depending on whether you use linux or windows you should find the bopimo folder with a saves folder and finally a backup folder. All the progress on your levels got saved to this folder.

Assuming you're on windows since it's more popular and you don't seem to be a linux user to me, it will be in appdata (hidden by default) > Roaming > Bopimo! > Client > Saves.