1. Bouncy/buggy polygons usually occur if you make them too thin; try too keep the polygons at least twice the size of the soldier if they are small (also try not to use too small polygons since they will act weird if the player is going fast).
Another common problem is not overlapping the polygons. Read more
here.
2. You should make objects (spawns) visible when you take a screenshot. That way people would be able to comment on them.
Right now the map looks very flat. Try coloring the vertices more to get some variation and perhaps also a more 3 dimensional look.
As for the map layout, I think that big thing at the mid top of the map is way too high and I don't think anyone in their right mid would actually go there unless they are using some really freaky tactics.
