Its hard to find much to say about ByzvsBrt. Really its just a random map with a slightly customized start.
Its a random map, and about as playable as one. Unfortunately you cannot attack the enemy early, so expect a long buildup.
Its not inbalanced. The enemy fortress shouldnt provide more than a speed bump for anyone that could win a normal islands random game against the AI.
No real attempt was made to differentiate itself from a random map. The only two changes are that you dont start with a TC, and that the AI has a bombard tower+walls fortress, when i believe the AI doesnt make walls on islands, so theres that.
Map Design 2
Its a random map, Islands.
Its the most bare minimum sufficient to avoid being rated a 1. There really isnt a story to be honest, but thats how the review guidelines call it.
Final thoughts: Play an actual random map instead, then you can customize the settings atleast.