Difficulty Settings & Intro Animation!

Main changes

Added intro animation that plays when starting wave mode

Difficulty settings!

Added easy mode and hard mode alongside normal which is just how things were before

Easy mode

Everything does 10% less damage

Enemies have a 10% higher chance of dropping health pickups on death

Enemies are 10% slower

Enemies have 20% less health (rounded down)

Enemy spawn interval increased by 20%

Time between waves is 60 seconds

Hard mode

Everything does 10% more damage

Enemies have a 10% lower chance of dropping health pickups on death

Enemies are 10% faster

Enemies have 10% more health

Enemy spawn interval decreased by 20%

Time between waves is 20 seconds

Bug fixes

Fixed the speedrun timer toggle

Did some other stuff I prob forgor ¯\_(ツ)_/¯