This map isn't horrible by any means. It just needs work. I agree, the ammo is in far excess of what is needed. Really you should only have 1-2 of every ammo and they should not be so close together.
Also, lower the invisible blocks with death. It is weird to die immediately after falling off the edge.
The layout is solid for 1-4 players, nothing incredible, but nothing horrible either..
Read the packaging docs to figure out the packaging.. It's not hard. You can usually infer it from looking at other people's maps on here and their packaging.
2/5 for now (that's 10/5 if I could give it such a rating.)