sounds like DDR material
not really sure on why you named it blue umbrella, but I like the song.
really like the track that layers over the main melody at 1:21.
the change at 2:00ish sounds a lot off from the main melody. I dunno if you're going for a chorus type of thing, so it's different from the main melody, but i'm just feeling like it's out of place. no solid logic, just a feeling. your return to the main melody @3:13 is pretty good.
good song, i like it!