13/2/2023 Difficulty Escalation, Tweaks

Tweaked the escalation of difficulty one more time, as well as minor bullet mechanics. Fixed a couple bugs from the refactor as well.

Changes include:

• Decrease maximum meteor spawn frequency.
• Decreased rate at which meteor maximum speed increases.
• Set bullet to cooldown upon falling into wormhole.
• Increased meteor variance.
• Maximum meteor speeds resets on new run start.
• Meteors appear in the game over screen again.