The map is small, but the buttons of the houses only the CT can squeeze them, The houses have a place where you can break to enter, In the zombie plague that there is in the cs2d these days, zombies do not have much life and die easy, It's okay to play something small and normal. Also, this map believes it several months ago, had it saved and thought to upload it: D
It's not great. It's okay, though. A lot better than what we normally get to see.
I suggest to add some wall patterns inside the map to present some strategy. Now there's just some random walls here and there and they don't really help much. It MIGHT be possible to play this on construction mode but nothing else. With zombie mode it's too hard cause no place to hide/build a reliable base in.