Not so epic.
This isn't much of a tutorial. You just put copy/pasteable script in there, and didn't even explain how it works or anything. And, it's really small text, so people can't read it. You didn't explain how people can customize it or anything. And it won't work with AS3. And there are bugs. Main one was you could kind of get in the wall and just go up. I got out of the stage in two seconds right at the start.
Score...
Graphics : 4/10 - Not very interesting.
Music : 6/10 - Got annoying pretty fast.
Tutorial-ness : 3/10 - Didn't teach, just gave us the code.
Code : 5/10 - Buggy.
Modesty : 1/10 - Self-explanatory. I didn't actually put this into my score though.
Overall : 4.5/10 - Rounds to five.