OO programming
Rooms
Objects
Sprites
Hungarian notation
Variables
Assignments
If statements
Wiki
Manual
Function
! == not
Another movement system
Global mouse event
Layers
String
with statements
Origin of sprites
optional parameters
place_meeting
point_direction
instance_destroy
Assignments
Designing
Collisions
For loop
direction
lengthdir_x
local variables
== is comparison
If/else
Defining variables
States