score = 0
timer = 30
letter = string.char(math.random(97, 122))
font = love.graphics.newFont(48)
gameover = false
love.graphics.setFont(font)

function love.update(dt)
    timer = timer - dt
    if timer <= 0 then
        gameover = true
    end
end

function love.draw()
    if not gameover then
        love.graphics.setColor(50/256, 127/256, 75/256)
            love.graphics.rectangle('fill', 0, love.graphics.getHeight()/2 - 50, love.graphics.getWidth() * (timer / 30), 100)
        love.graphics.setColor(1, 1, 1)
        love.graphics.print(letter, love.graphics.getWidth() / 2 - font:getWidth(letter)/2, love.graphics.getHeight()/2 - font:getHeight()/2)
    else
        love.graphics.setColor(200/256, 50/256, 50/256)
        love.graphics.print("GAME OVER", love.graphics.getWidth() / 2 - font:getWidth("GAME OVER")/2, love.graphics.getHeight()/2 - font:getHeight()/2)
        love.graphics.print("Press R to Restart", love.graphics.getWidth() / 2 - font:getWidth("Press R to Restart")/2, love.graphics.getHeight()/2 + font:getHeight() * 3/2)
    end

    love.graphics.setColor(1, 1, 1)
    love.graphics.print(score, love.graphics.getWidth() / 2 - font:getWidth(tostring(score)) / 2, 0)
end

function love.keypressed(key, scancode)
    if key == letter and not gameover then
        score = score + 1
        letter = string.char(math.random(97, 122))
    elseif gameover and scancode == 'r' then
        score = 0
        gameover = false
        timer = 30
    end
end