Pros: Its a complete map.
Cons: Little detail, 2 textures, 4 blocks inside a bigger block. Why would you want to use Nightvision?
Improvements: Try to make a map with more than 2 textures, add lighting, a light_env will do the trick. Add more than just 4 blocks, where is the light comming from, try a prop_static light. Make it look more realistic.
Notes: While i see you actually made a map and tried i see this of little use and or function.