Actually, I would say that you shouldn't release any of your creations until you are ready to accept criticism. I see alot of people that say "don't be so harsh its my first level", but without being a little harsh, you can't really get some good points across. All creations should at least follow the basic rules (Maps should have thok-barriers, SOCs should be more than simple timer-mods, etc.). If you can't at least do these things, then you aren't ready to release your creations to the public. People are going to be harsh in their criticism because it is required to let the wadder know what they are doing wrong. If no one tells the wadder what they are doing wrong, they will never improve. However, the wadder must also be willing to accept some of this criticism, instead of just ignoring it. Ingoring criticism is the same as not receiving any; you can't get better unless you use it.
So, back to the main point, don't release wads until you've got a good understanding of the basics and are ready to accept and use criticism to improve your future wads.