While not bad, the map does need some serious work. Your textures clip and flicker a lot in random spots, and in the second area, there's a couple large boxes of intense bright light, but there's no source whatsoever. Some of the rooms feel a tad barren, and the layout needs work. A couple keys have some cryptic placement. My biggest complaint though is your monster placement/frequency. You have a surplus of monster encounters, so much so that I had 2 monsters roaming the halls at the same time at one point. The monsters patrol in areas that are incredibly tedious to get by without getting killed (I only managed to escape 1 monster), and this is because they patrol small halls with little to no room to hide or get by without being noticed, and their patrol route is very short, so you have such little time to react. The appearances of the monsters themselves is very sporadic and there's no way to know when or where one is going to come. I'd definitely suggest working on how you place your monsters, their patrol routes, using less of them and possibly making them despawn after a while instead of patrolling forever. Also, when you aren't being bombarded with monsters, the map is fairly...lacking in entertainment. It's just linear gameplay of get key, open door, get key, open door, monster, get key open door, rinse and repeat. You should mix it up more with some atmosphere, use some ambient sounds, maybe add more puzzles. Speaking of puzzles, I did, however, enjoy the buttons scattered through the 4 rooms in the third area used to open the other door in the hall, I thought that was a well executed idea.

I have hammer and chipper, and cannot combine them, is that right?
seems there are only one closed shelf in the table.
other keys fully operable