Too short
It's not a brilliant loop, but it does have potential. What I'd suggest is that you work on making the spaces between the notes equal, as there is one in the middle that is off by maybe a quarter of a second, but it makes such a difference, especially if it's on a track that loops over seven seconds.
When you get that sorted, loop it over and over for about 2-3 minutes, then expand upon it. Use this as the base and build up things like a beat, a melody and other bits and pieces to make the tune sound better. Sure, if you'regoing for an 8-Bit sounding loop, you don't have much to work with, but there is a lot more than you've got at present :)
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