Fix critical error page and improve db maxScore snake game logic

[carolinaisslaying]

Description

This resolves an issue where the critical error page... wasn't working that well, as "del" was undefined, as well as the maxScore being set in the db to a more concise and appropriate database request.

Changes Summary

• Snake game now uses mongodb's $inc to set a new maxScore in the db.
• On the critical error page, ejs checks if del is defined first, and will omit the line that requires the use of del if it is undefined (that line is non-critical and just sets the release for sentry).

Type of Change

• Feature enhancement
• Bug fixes
• Refactor
• Breaking change
• Performance improvement/reducing time complexity

Confirmation Checklist

• I have ensured that my code follows the project's style guidelines (pnpm run pretty).
• I have performed a self-review of my code and corrected any issues.
• I have tested the changes to verify they work as intended.
• I have confirmed that my changes do not introduce new security vulnerabilities.
• I have documented and communicated any breaking changes appropriately.