I played it, and a couple of things:

1. It is an overall fun, yet tiny, map.

2. For your fist map, there is a fair amount of detail (Compared to others first maps :D)

3. The texturing seems kinda bland to me.

4. Lots of the gameplay is trying to kill others without falling off :D

5. Great job, though, Pretty damn good first map :D

4/5

Nice to see someone making a duel map.

It´s not bad, though a bit fiddly and cramped, navigating those tiny ledges takes the speed out of it.
It could have all been x2 in size, and would have still worked, maybe even better.

And imho, healthboost should never be on a 1on1 map. Quad as well (though quads a matter of opinion). But HB definately makes 1on1 ffa pointless.

Still nice work for a first!