"aaahhh"
Honestly, I had to give this a five, because of:
1. The music.
2. The falling down noise. I'm officially high on sugar at the moment, so it sounded more awesome than reality. 3..2..1.. "AHHH" :3
3. It has potential, you just need to keep working on it.
It lacks another five stars because of the lack of interesting elements, the music stops alltogether once it finishes instead of replaying, and not being able to jump on to some boxes past, like, the third or fourth level, considering another box is in the way, so you fall down. Add maybe a background, or something interesting to look at, then you'll have a game that people will most likely not give you a 0 rating for.
By the way, what's the song?