1.2 Update

Christmas Update 1.2!

- Added Christmas theming! (snow, Christmas lights)

- Redid save file system for more flexibility (old saves should be automatically converted)

- Added 2 new levels: "Gaps" and "Salient Slopes"

- Remade level 10/11 "Sudden Valley"

- Added slingshot guide option to (kinda) help visualize where projectiles will go

- Vsync display option

- Level balancing

- Physics balancing

- Easter egg added