Pros:

Very fun to play, just one chapter but really intense.
The path is quite clear and the infected have many way to combine an attack.

Cons:

A bit too short, but the difficulty is good enough, so it balance with the short lengh.

Maybe a bit too hard to play in survivor, but that's part of the challenge.

Conclusion:

For a first map I'm really impressed by the quality and details present. I can't wait to see the next one from the same author. Keep it going man!