I have played about 20 games in the last few days. I made some changes to either make it look better or to improve the overall gameplay (since I think its equally important).
* Added a place in the back of the base to hide buildings for surprise factor (some examples are Lumber Mill / War Mill for tower rushes, Gryphon Aviary, Ancient of Wind, Chimaera Roost, Boneyard and Sacrificial Pit).
* Removed a Merc camp and Merc shop because I never had the resourses to actually use the 3 of them. The 3rd small camp was also quite op at times since you could reach Lv4 with any hero easily if you got Exp books.
* Removed the big Dragon since he was too OP. Going for that camp without mass air was a suicide because the Bridges generates a choke point, the Dragon would obvliterate half of your army and if your opponents gank you you kind of lost the game.
There's a lot of space in the terrain.
I Suggest adding more Rocks and Outland Trees and Plants.
I have done some changes. What do you think?
It's like an arena, isn't it?
The first name of the map was "Outland Arena", then I changed it to Bridges since I added way more bridges that I originally intended.
I would say having an additional gold mine would be much better.
Though this map suits for tactical war with limited resources. Being able to mass in seconds.
I thought about adding an additional gold mine, but it goes against the concept of the tiny/fast map.
Thats why I only added Merc/Dragon camps + Tabern, rather than shops. Originally, I had a Market in the middle, but ended with the double Dragon Nest since, since it goes better with that theme.
Terrain = too flat, too few tile types.
Mercenary camps = too many.
Gold mines = too few.
Doodads = spammed in groups for no reason.
My vote = rejection.
Overall, the quality is too low for approval. Please don't be discouraged though. You choose an interesting tileset and attempted some more difficult features - bridges. So, I can see you have potential.
You made a good try but you need to work more on blending everything.
Please read these:
Beginners Terrain Tutorial
Advanced Terraining
Village Forest Terrain
Easy Waterfalls
I made some changes to the flatness. Now the Tabern/Mercs are at 2 elevation, and the rest of the side ilands and the main is at 1 elevation.
The map now is about 20% Abyss, 25% Dirt, 25% Rough Dirt, 15% Flat Stone, 10% Rock and 5% Light Flat Stone.
I also removed one of the Merc camps and Merc shop and moved the Tabern there, for the reasons I explained before.
About the Gold mines I already said what I think.
Doodads were rearrenged, what do you think about them now?
Finally, I didnt expect to get an awesome perfect map in my first try at my first map ever, so Im not discouraged at all

I will be reading those links and see if I make further changes.
Any more feedback is welcome!