In some rare cases, the game will glitch out and not allow you to play levels anymore. In this guide I will hopefully try to explain how to temporarily fix this.

1: Hold the windows key and press R

2: Type "%appdata%", this will open the file explorer

3: Move up a folder and click on LocalLow

4: Open the folder called "Nasheik" and then "CleaningTheSystem"

5: Delete the "PlayableLevels" folder

6: The problem should be fixed once you restart the game