Alrighty, the much sought after difficulty options have been added! No tourist difficulty since the base defense aspect is a much larger part of the game this time around. Sprite swaps have been partially implemented as well, I still have to implement swapping the portraits and cutscene sprites. The main ones are a bit iffy at the moment, since there's actual hitboxes involved I'll have to write a much more extensive tutorial this time around.

- Added difficulty options when starting a new game. This will affect the time between waves as well as enemy health, speed, and damage

- Added sprite replacement for the main sprites only

- Pod wreckage is a little bigger now so pilot can reasonably fit in one

- Fixed some typos

- Added an intro sequence when starting a new game

- Moved the tutorial into a separate section that can be accessed or skipped when starting a new game