Hmmz, I'm currently on a design school, and one thing that we've learned in the beginnen is never write letter beneath eachother like this
cause it makes it hard to read.
Also, the Font isn't exactly what I call a "Superman" Font.
Another thing, I notice you sqeesed the superman logo on the side, never squeese things cause it makes it 9 of the 10 times ugly;)
For the rest, it's getting some form and with some work it can be a good custom:)