I think that, as an intro piece, this could work well, but only in the sense of being filler music. While the song was well developed, it was a little repetitive, and there were few parts that actually made me snap to attention (one being near the end of the song, where you had a good key change). With that in mind, I imagine that, to anyone who's playing your game focusing on the music even less, this song will sound like nothing more than some faint background sounds.