No music and no sound effects, too bad. It would be nice to add more different types of meteorites or power-ups. There is also a bug with scrolling through the upgrades, it's too slow. On the positive side, the game has clean graphics and the gameplay is simple and easy to understand. Overall, the game has a clean and simple gameplay, but the lack of music and sound effects, slow scrolling and limited meteorites/power-ups makes the game less enjoyable.