OO programming
Hungarian notation
Hard coding
Variables
Initialize variables
Local variable
Integers
Booleans
Strings
Constants
Assignments
Conditionals
Function
Overriding
Optional parameters
With statements
Random
! means not
-= shortuct
Tab & Shift Tab with identiation
Drawing engine
Coordinate system of GameMaker
String concatenation
Room editor
Frames per second
Origin of sprites
Collision mask
Destory
obj_game_control
other
alarms
built-in variables sprite_width
Another movement system
Rooms
Objects
Sprites
Layers
place_meeting
point_direction
instance_destroy
instance_create_layer
draw_healthbar
Triggering of events
Create event
Step event
Collision event
Draw event
Global mouse event
Wiki
Manual
Alt-tab shortcut