게임을 그래픽과 난이도로 향상시키기

Okay, it works quite nicely, thanks. Now let's make this a bit more polished with better graphics, and let the difficulty gradually increase instead of having just one obstacle every time. Let the jumping object be a frog, and the obstacles be something fitting for it. Sometimes, let there also be flies, so we can jump and catch them, earning extra points from them as well.