I don't think it's too long, per se, I think it's actually three tracks in one. Of the three, I think the first is the weakest (start until about 1:50)it sounds very early nineties electronica, and not in a particularly fantastic way. Having said that, I never really was a big fan of that style. The second section (1:50 until about 3:30) is much stronger overall. I like the burbling bass in it a lot, and the percussion is more subtle but better for it. Of all the sections, though, I most like the third. It's definitely the most ambient of the three, and the percussion is the most interesting. The other sounds are given more room to breathe in this section. If I was you, I'd take out the third section altogether, and make it a standalone track, and develop it in this context.