made changes to how input and bullet spawning is handled
direction is now calculated based upon angles not series of bool values
added impassable tiles wip, i will probably revert some change because some stuff here is clunky
Viewport
Enhanced UI, how shows health graphically. Upgrade to use percentage.
Zombies have a new spritesheet and can be viewed from angles.
Created a zombie spawner, a voodoo shrine entity, which spawns zombies after an interval in its area.
Many zombies cause lag.
Repo change.