function find_path(level, src, dst)

-- moving player without moving any crates
function find_empty_path(level, src, dst)

  local path = unwind_path(find_path(level_state, player, {y=y, x=x}))

  local path = unwind_path(find_empty_path(level_state, player, {y=y, x=x}))

  local path = find_path(level_state, player, {y=y, x=x})

  local path = find_empty_path(level_state, player, {y=y, x=x})