What an amazing game to make in 48 hours! It looks like a fully-fledged short game, and it was very addicting. The melody is simple but it hypnotized me so much that it's still playing in my mind while I'm writing this comment XD
Although, I think more visual feedback for hits will be of a good help, I wasn't sure what destroys the yellow thing for so long. In other aspects, though the controls were comfortable and intuitive. So, it's a really good game with a great mix of the art, the music and the mechanics!