Settings stay as is for a level, even after going to the menu.

[SusDTSteve]

Describe the bug
After exiting a game (exit has a non-existent level to go to) and going into the settings, the main menu disappears and you are left with level settings, rendering the game unplayable.
To Reproduce
Steps to reproduce the behaviour:

1. Create a level
2. Make the level as easy or as complicated as you like
3. Leave the exit level as is
4. Save and exit to the menu
5. Open it in "User Levels"
6. Finish the level.
7. Go to settings.
8. Bug

Expected behavior
The game would crash, like the other 2 versions of cubosphere.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: 100% Any OS.
• Version [e.g. git eabc0b9]
• (still dont know what /\ means)

Additional context

• Bug type: Game meant to load non-existent level, does not crash
• Affected component: Game, bricked Restart, required (to start playing again)