TIC-80 Player Movement

playerMovement.lua

-- variable to save if the player is moving
-- in a direction sideways, for us to make
-- the ship lean in said way
leaning = 0  
if btn(0) then 
  y=y-speed
end
if btn(1) then 
  y=y+speed 
end
if btn(2) then
  x=x-speed
  leaning = -1
end
if btn(3) then
  x=x+speed
  leaning = 1
end
if btn(5) and (nextShoot < t) then
  --shooting code
end