This is a super hard map where mobs come and attack you, can you survive?

In case you can't do the .rar file, here's a .zip: www.4shared.com/zip/zsOygn78/Vs_Mobzip.html

How to play:
1. Hit the button right outside the doors, then you should be good to go!
2. ONLY HIT THE BUTTON ONCE, OR YOU WILL SCREW UP THE GAME!

Rules:
1. No Hacks, Mods, Cheats, etc (exception of any item spawner for if you run out of items that come to you).
2. No running up the water(doesn't matter you'll die anyways)
3. Play on at least easy(durr)

If I were you and were playing this map, I would..
1. Play as a team!
2. Not go too crazy, you'll probably die!
3. Not to lock yourself in a room, sooner or later you will die!
4. Record it with a commentary, upload it to youtube and send it to me where I will feature it on this post! :D

Have fun, and I hope you like it!:D

Additional Notes

This is my first map like this, I know it sucks building wise. Tell me what you think though!