There’s a pretty interesting topic on /r/windows10 today. Someone is having problems with Superhot VR edition. Basically his savegame got corrupted somehow and unfortunately the broken file is already up in the cloud.
What doest that mean? According to Microsoft support you have to “play the game again”. Ouch.
On Steam whenever you’re having problems with syncing your saved games the program actually asks you if you want to use the local saved games or the cloud ones. But not on Microsoft store, if something goes wrong you’re screwed.