Sorry for the double post, but I have some updates.
-The game will now have 21 levels, a few of those levels divided into parts instead of 1 or 2 full levels.
-Tactics are important: your enemies know you're coming, and you have to expect their movements. Take cover, lean around corners, all that. Thanks to Slayer222 for the script(s).
-Some health items can be used once, i.e. painkillers, small medkits, and stuff like that. Thanks again to Slayer222 for that script.
-You'll encounter mines throughout the game, thanks to Conjured Entertainment's scripts.
-Sometimes, you'll find a storage room filled with ammo/new guns. Use this to your advantage, but you'll need to find hidden keys for these rooms.
Enjoy the updates!