Starting every level with Pistol and 8 bullets.
Level 1: My least favorite level so far. I don't think mutants and mazes are a great way to open. I was lost for some time. Still given Chris and vermil talked about this thing picking up I just strolled my way through.
Level 2: More mazes, but no mutants this time! Admittedly it's not my favorite but this level didn't bother me that much because you are given a Chaingun in the open almost right away. I kind of found it fun to just smash all the enemies away (the secret level does this with more adrenaline and rewards though). And I actually spent less time lost than Floor 1.
Level 3: Far above the first two levels, this is a very good map inspired by the original (as the title implies) without seeming like a copycat at all. I really liked the flow of it all and enjoyed the whole thing (in fact better than the original Level 3 or at least as good), though my least favorite part was again the mazey grey/occasional slime section near the start. But it's a good way of transitioning out of that texture scheme from the first two levels, per se. And I'll have to find all those health, ammo, and treasures someday. I didn't stick around to look for the secrets, but they sure caught my eyes!
Level 4: Equally as good as Level 3, with quite a bit of non-linearity once again especially when you have a key. The brown mutant maze was my least favorite part but there wasn't any area I didn't like. Lots of action, lots of fights, and good use of textures. Putting the mutants by the second key in an area that wasn't textured to expect them proved a very effective trap. Before going for the secret level I did find the regular elevator, and I wasn't sure why it has those two little nooks in the doors on the left and right...
Level 19 (Secret Level 1): If this were a regular level, I'd be saying...what?...but being a secret level it nails it at being different and fun. There's enough supplies to keep frustration away but not enough to make it a stroll. Having to constantly be on the run when uncountable SS are after you and Ghosts lurk around as well is sure adrenaline pumping, and in a good way. And you have to fight a boss too. This level seemed like a perfect fusion of the concepts of E3L10 and E4L10 of Wolfenstein 3D, both improved (both as in it's a maze full of treasure, E3L10 with the wide-openness and Ghosts, and E4L10 with all the other enemies, even though they are SS this time rather than Officers). I like how it's all multicolored brick rather than just normal red. Those two doors with nooks in the normal exits puzzles me a bit AGAIN, but not for too long... ... ...
Level 5: ... ... ...Because as I was taking a look at my surroundings, I saw those two side doors a third time. But less than a second later, I'd realize that this time, they don't have bonus stuff in them, as I would soon find out! Those SS are sure a great way to get things rolling especially since numerous other enemies hear you. I made a mad dash to the ammo side to get full ammo, then a mad dash to the health side to fight everybody, killing an SS for the Machinegun just before I hid for the health (and being sure not to shoot prior). After most were dead, the rest of the level wasn't too tough, with no one guarding Trans, though the pillars made it initially slightly trickier, but having him in an additional room full of other enemies would have made it a far better challenge. This level gets all its points for that beginning though, it was an awesome idea to force the player right into action!
Overall: Levels 3, 4, and the secret level were pretty much thoroughly great maps, and I really liked Level 5 just for the start. The first two levels weren't as good but I'd consider only Level 1 to be down in the 'average' category. Lots of fun so far and I'm looking forward to more.