Mini bug fix and polish update. Also UI

Notable Changes

•  Added Status Effects and Power Ups
•  The Centifly now teleports after shooting (this is a temporary behavior)
•  Added 4 power ups
  •   Strength
  •   Poisoning
  •   Defence
  •   Regeneration
•  Removed damage variation
•  Enemies now have slight variations in health replacing damage variation(because why not?)

Quality of Life

•  You can now switch weapons while reloading
•  You can press 'Q' to switch weapons (toggle)

Polish and Sound Effects

•  Added a sound effect when a projectile is broken
•  Added a sound effect when an enemy is hit
•  Added a sound effect when damage is taken
•  Added a sound effect when dash recharges
•  Added a sound effect when a Centifly shoots
•  Added a sound effect when a weapon successfully reloads
•  Added enemy death particle effects

Balance

•  The Revolver now does considerably more damage
•  Player speed has been reduced (walk speed and sprint speed)

Bugs

•  You can't hit enemies while they are directly in front of you (FIXED)
•  Splash screen no longer looks weird (should no longer be slightly stretched, and lasts longer now)
•  That's literally it there weren't that many bugs from 2.0

Other Stuff That I Haven't Been Able to Categorize

•  Added 1 new music track: Existential Dread (Title Screen)
•  Implemented the UI
•  Implemented the HUD
•  Removed cheat mode (it was broken)

Technical Stuff That You Probably Don't Care About

•  Enemy and Player health systems now use the same base code
•  Cleaned up the scrips folder (it was a mess)
•  UI now uses one base color file (so I can easily modify stuff, and also for consistency)
•  New balance system
•  I can now EASILY set the game version (so I no longer have any excuse if I forget to update it)