Nice idea with the islands connected up and it has a nice theme, not quite disco, but enough inferno lol
I think the back end of your TD area, with the two islands, needs to be copied and added to the other TS end..or deleted. Not sure which but I would prefer having it added to the other end.
Of course this would be made much easier if the editor had a rotation option for cut & pasted sections. It's an utter pain trying to mirror image a complex piece of work.
Few more tweaks and I think it will be a pretty decent map.