Fix mirror tower stages; fix tower time challenge and star scoring

[longfruit]

Description

Improve Tower experience:

• Mirror stages should now work
  
• Stars can now be lost in time challenges. Monolith HP% challenges still wip
  
• Correct number of stars are awarded and recorded at the end. 1000 primos are given anyway, why not.
  

Issues fixed by this PR

Type of changes

• Bug fix
• New feature
• Enhancement
• Documentation

Checklist:

• My code follows the style guidelines of this project
• My pull request is unique and no other pull requests have been opened for these changes
• I have read the Contributing note and Code of conduct
• I am responsible for any copyright issues with my code if it occurs in the future.