Seems pretty good as a first. My first file was alright xD Not too bad, but not great either :V Anyways, about your file, the only two things I would say are that to keep in mind the footing. After certain patterns you create a double step to start a new stream, or at times even in the middle of streams. So just try to work on that for playability and etc. The other is to just be a little consistent with the patterns used in some parts of the songs, but that's just something personal for me. Anyways good job. And yeah, what Bmah said :V

Pinkie Pie Approval

Basically what bmah said repeats for me. You could simply change the offset in order to make the proper color (red vs blue) appear at the right time.Otherwise, it looks actually fun! :)