function _init()
  --renders game at 64x64
  poke(0x5f2c,3)
    cls()

  --creates variable t to store timer info later in code
    t=0

  --establishes boundaries of the level
  level={
    w=64,
    h=250,
    cy=0
  }
  cam_x=0
  cam_y=0
  player = {
    sp=1,
    x=28,
    y=50,
    h=100,
    t=0,
    imm=false
  }
end

function _update()

  --autoscrolling code
  --moves both the level/background and the player at the same speed, to simulate movement
  if level.cy<level.h-64 then
    level.cy-=2
    player.y-=2
  end

  --statement that will trigger invincibility frames
  --inactive atm
 if player.imm then
   player.t += 1
   if player.t >30 then
     player.imm = false
     player.t = 0
   end
 end

  --timer and statement that flickers back and forth between sprites to simulate movement
  t=t+1
    if(t%8<3) then
        player.sp=1
    else
        player.sp=2
    end

  --basic movement code
    if btn(0) then player.x-=1 end
    if btn(1) then player.x+=1 end
    if btn(2) then player.y-=1 end
    if btn(3) then player.y+=1 end
end

function _draw()
  cls()
  --camera that follows level's movement
  --also keeps player on screen
  camera(0,level.cy)
  if level.cy<-80 then
    level.cy=0
    player.y=50
  end
  --draws map, extended to -100 to allow for longer stretch of road
  map(0,0,0,-100,12,63)
  --draws player car
  spr(player.sp,player.x,player.y,.75,2)
end