@jsberg They're stored on your computer. You can use symlinks and a cloud storage service (owncloud, dropbox, google drive, etc) to sync everything from one computer to another, but other than that, no it's all local.
FWIW (re: thinking the latest fix resolved the offline progress issues) it didn't work for me overnight last night :( I don't have much in the way of debugging information though. It's worked fine every other time I've tried it over the past couple days.
Menu navigation is clumsy - sometimes doesn't register the "down" key before I hit "space"; defaulting the level to the HIGHEST level I've seen is stupid. No suicide button in a game whose scoring relies on combos. Poor target placement such that it is, with shockingly high frequency, impossible to get the target without eating a hit. Again, in a game whose scoring relies on combos.
 "Boxtroyer Upgrader"){kind=icon}
 "ClickBattle"){kind=icon}
 "AdVenture Capitalist"){kind=icon}
 "Back to the Cubeture (1)"){kind=icon}
 "Survival Lab"){kind=icon}
Next issue to be solved!