Here are the key properties and variables that instances in GameMaker have:
- x, y: The position coordinates of the instance in the room.
- hspeed, vspeed: The horizontal and vertical speed of the instance in pixels per step.
- direction: The current direction of motion as a degree (0-360), where 0 is right, 90 is up, 180 is left, and 270 is down.
- speed: The current speed of motion in the given direction.
- visible: A flag that controls whether the instance is visible or not.