#define FLOOR (160<<8) 
s32 x;
 
s32 gravity = 32; 
s32 velocity_y = 0;
s32 spritey = 190<<8; 
s32 takeoffspeed = 1000; 
 
	while(1) 
	{		
		x+=Pad.Held.Right-Pad.Held.Left; PA_SetSpriteX(0,0,x);
 
		if(Pad.Held.B)
		{
		   x+=(Pad.Held.Right-Pad.Held.Left)*2;
		}   
 
		if((spritey <= FLOOR) && Pad.Newpress.A)   
		{ 
			velocity_y = -takeoffspeed;  
		}
 
		velocity_y += gravity; 
		spritey += velocity_y; 
 
		if(spritey >= FLOOR) 
		{
			velocity_y = 0;
			spritey = FLOOR;
		}	
 
		if (spritey>>8 > -32) PA_SetSpriteY(0, 0, spritey>>8); 
		else PA_SetSpriteY(0, 0, 175);				
 
		PA_WaitForVBL();
	}