Well here is a short review.
The terrain needs a lot of major improvement, its flat, empty and lacks even an average layout to make it interesting. My best advice for you is to read some tutorials on how to terrain and there are also a couple of tutorials on how to make a melee map (by me and the other one is -kobas-). But to improve this specific melee map, but I suggest you play with the tiles more, I mean a single tile for a melee map is just unacceptable, its ugly and doesn't mean even the average standard of melee terrain.
Next is how you design your terrain, its really bland, it lacks detail to at least please the most casual of melee players I suggest that you familiarize yourself on every doodads that is available first before you start some serious melee terraining since it will really help you on the long run.
Now lets talk about your terrain layout, its not really that bad since it offers routes that can be use for strategical warfare but your empty terrain makes it look horrible.
Some other notes are:
Red have huge disadvantage on the terrain, the blue can get to the goblin lab first and have the quickest possibility of buying a zeplin and a shredder. Map lacks creep camps for early farms it also lacks varieties of neutral buildings like goblin shops, tavern and others.
Its not bad for a first timer but it only gets 1/5. Keep working, you're on the right path.