Okay. I tested this map, and this is my honest opinion.
Good Points
+This map has a working thok barrier.
Bad Points
-This map is rather small like my level.
-This map is not easily manoueverable.
-This map's rings are too close together - it took me just 55 seconds to collect all the rings in this stage and see the lot.
-This idea is not all too original.
Okay. Overall, I would rate this map very lowly. This is what needs doing.
Improvements
=Extend this map.
=Use a little bit more of an open space to run around and shoot people in. Can you imagine playing a vaguely competent Tag match here?
I hope I haven't missed anything! Overall, I'd say read
Level Design 101 and keep practising! I hope i've helped you a little.