I think you forgot to put up a picture. You should do so now before this gets locked.
I had a lot of lag because there are too many dynamic objects in the level that don't need to be. In the second room you have nearly 20 crates and barrels that could be static.
I think you have too much ammo and weapons available from the start.
Your enemy AI needs work. I never had to fight more than one enemy at a time, even when you had three in a room. Only the one fired upon fired back.
Level design was somewhat dull and empty. You may want to create smaller areas with more content and use some lighting, sounds to make it more interesting.
Needs work but I've seen much worse.
Happy game making.
The forum provides a means to hide our true identity. Too bad we always screw up and let it be seen.
