local function touchPlay(event)
    local bounds = buttonPlay.contentBounds
    local isWithinBounds = bounds.xMin <= event.x and bounds.xMax >= event.x and bounds.yMin <= event.y and bounds.yMax >= event.y
    if event.phase == "began" then
        buttonPlay.currentFrame = 2
        display.getCurrentStage():setFocus(buttonPlay, event.id)
        buttonPlay.isFocused = true
    elseif buttonPlay.isFocused then
        if event.phase == "moved" then
            if isWithinBounds then
                buttonPlay.currentFrame = 2
            else
                buttonPlay.currentFrame = 1
            end
        elseif event.phase == "ended" or event.phase == 'cancelled' then
            if event.phase == "ended" and isWithinBounds then
                -- change scene here
            end
            buttonPlay.currentFrame = 1
            display.getCurrentStage():setFocus(buttonPlay, nil)
            buttonPlay.isFocused = false
        end
    end
end