Global
	
on keypress(up):
	set player's avatar's y-velocity to 1.0
	
on keyrelease(up):
	set player's avatar's y-velocity to 0.0
	
on keypress(down):
	set player's avatar's y-velocity to -1.0
	
on keyrelease(down):
	set player's avatar's y-velocity to 0.0
	
on keypress(right):
	set player's avatar's x-velocity to 1.0
	
on keyrelease(right):
	set player's avatar's x-velocity to 0.0
	
on keypress(left):
	set player's avatar's x-velocity to -1.0
	
on keyrelease(left):
	set player's avatar's x-velocity to 0.0