Impressive work actually,
Some of the screens makes your maps seem a bit simple, but I can tell you understand geometery so I would imagine you can make some well detailed maps. I would like to see some more complex lighting in your maps.
You're very talented at your age also, I might say.
I'd vouch to see you as a trialmember. In my opinion dedication is more important for devs anyways, additional hammer skills become learned as you map more. Because we have seen to many great mappers just drop their trials after a couple of days.