Jeff Use Cases

Jeff moves left/right
	Main
	1.1 Screen scrolls with Jeff, keeping him in center
	2.1 Accelerate movement by rate A	

	Alternate
	2.2 Jeff is sprinting
	3.2 Accelerate movement by rate 2A

	Alternate
	2.3 Jeff is changing directions (example: hit left while moving right)
	3.3 Change Jeff's facing
	4.3 Decellerate movement by rate 2A if walking or by rate 4A if sprinting

	Alternate
	2.4 Jeff is in mid-air
	3.4 Accelerate movement by .5A

	Alternate
	2.5 Jeff is crouched
	3.5 Accelerate movement by .5A


Jeff Jumps
	Main
	1.1 Jeff's verticle movement is increased proportional to horizontal movement
	2.1 Durring the jump, the longer the jump button is held, the higher jeff goes
	3.1 Jeff maxes out at a certain height, and then begins to fall

	Alternate
	1.2 Jeff is in the air
	2.2 Nothing happens

	Alternate
	1.3 If Jeff has double jump unlocked, 
	2.3 [see 1.1]

	Alternate
	1.4 Has already jumped with double jump, and is in mid air
	2.4 Nothing happens

	Alternate
	1.5 Jeff is crouched
	2.5 Nothing Happens


Jeff Ducks
	Main
	1.1 Jeff's height is reduced by half

	Alternate
	1.2 Jeff is in mid-air
	2.2 Nothing Happens


Jeff gets on ladder
	Main
	1.1 Jeff's horizontal and verticle momentum stops
	2.1 Jeff is now on a ladder


Jeff moves up/down a ladder
	Main
	1.1 Jeff moves up/down on the ladder
	2.1 Jeff's facing is made up/down

	Alternate
	2.2 Jeff reaches the top/bottom of a ladder
	3.2 Jeff steps off the ladder


Jeff Hits Obstacle with head
	Main
	1.1 Jeff's verticle movement is reversed

	Alternate
	2.2 Jeff's head strikes a harmful obstacle
	3.2 [see "Jeff takes damage"]

	Alternate
	1.3 Obstacle isn't tangable in the direction of travel (one-way platforms)
	2.3 Pass through it


Jeff walk/runs into an obstacle
	Main
	1.1 Jeff's horizontal movement becomes the horizontal movement of the obstacle

	Alternate
	1.2 Jeff takes damage from a harmful obstacle
	2.2 Jeff's horizontal movement is bounced back at R speed
	2.3 [see "Jeff takes Damage"]


Jeff takes Damage
	Main
	1.1 Jeff loses hit points
	2.1 Jeff blinks invincible for S seconds
	3.1 Jeff becomes is no longer invincible

	Alternate
	1.2 Jeff dies
	2.2 Decrement number of lives
	3.2 Level resets at the begining of the level	
	
	Alternate
	2.3 Jeff has no more lives remaining
	3.3 Display Game Over
	4.3 Enter user into the high score
	5.3 Return to main menu screen


Jeff attacks with Katana
	Main
	1.1 Enemies one space in the direction of Jeff's facing take damage

	Alternate
	1.2 Clanks off of an obstacle


Jeff attacks with Fireball
	Main
	1.1 Fireball is released at a downward angle
	2.1 Fireball bounces
	3.1 hits object, damages object
	4.1 Fireball disappears

	Alternate
	2.2 Fireball falls off screen
	3.2 Fireball disappears

	Alternate
	2.3 Jeff just shot a fireball
	3.3 Wait S seconds for cool-down time before another firball can be thrown


Jeff attacks with Tomahawk
	Main
	1.1 A Tomahawk in thrown
	2.1 The tomahawk follows a parabolic arc (based on Jeff's current momentum)
	3.1 Hits an enemy, Enemy takes damage
	4.1 The tomahawk disappears
	
	Alternate
	2.2 Tomahawk falls off the screen
	3.2 Tomahawk disappears

	Alternate
	1.3 Jeff is out of tomahawks
	2.3 Nothing happens


Jeff attacks with Laser
	Main
	1.1 A beam shots out with a horizontal trajectory (no verticle momentum)
	2.1 Hits an obstacle, obstacle takes damage
	3.1 The beam disappears
	
	Alternate
	2.2 The beam travels off screen
	3.2 The beam disappears

	Alternate
	2.3 A shot was just fired
	3.3 Wait s seconds of cool-down time before another shot can be made 


Jeff Collects an item
	Main
	1.1 Score increases
	2.2 Beneficial effect occurs (depending on the item)


An enemy dies
	1.1 Score increases