function _init()
    gsm = sm:new()
    gsm:setsts({ s_title, s_game, s_gameover })
    gsm:init("title")
end

function _update()
    gsm:update()
end

function _draw()
    cls()
    gsm:draw()
end

s_game = state:new("game")
function s_game:enter()
    psm = sm:new()
    psm:setsts({ ps_idle, ps_move, ps_dead:new() })
    psm:init("idle")
    player:spawn(64, 96)
end

function s_game:update()
    psm:update()
end

function s_game:draw()
    psm:draw()
    player:draw()
end

ps_dead = state:new("dead")
function ps_dead:new(o)
    -- inherited state
    o = state.new(self, "dead")
    o.timer = 0
    return o
end

function ps_dead:enter()
    start_shake(10, 10)
end

function ps_dead:update()
    update_shake()

    if self.timer >= 30 then
        gsm:trans("gameover")
    end

    self.timer += 1
end