I wasn't skilled enough to complete your level, but here's my (p)review for what I've seen.

Eyecandy:
The eyecandy was nice, I like the tileset. The background looks very well, only I think layer 8 should be textured mode (fading into blue). The sprite layer eyecandy is ok, some parts look cool. I've seen no tilebugs. Probably some moths would've looked cool and I also reccomend using ambient lighting on about 75%. Probably some more layer 3 eyecandy would be good. And layers 1 and 2 could be used to mix it with layer 3, but that's probably not needed.
Overall the eyecandy is nice but could have some more improvements.
Pros: Solid eyecandy, good layers 5-7, no tilebugs I've seen.
Cons: Could use more layer 3 eyecandy and probably layers 2 and 1 as a second and third layer 3, more sprite layer eyecandy needed
Rating: 7.0

Gameplay:
The gameplay is a bit too hard I think. Very much spikes used and such stuff used. While playing I felt a bit like playing Tomb Rabbit with the difference that it's partwise nearly unfair (Tomb Rabbit was never unfair). I wasn't able to finish the level, I only made it to the second checkpoint. I like hard levels, the problem is only that the hardness of this level is too unbalanced. In Tomb Rabbit (I will make some paralells) there were mostly some easier parts after very hard parts. This level uses one hard part after another one, it's just frustrating. The difficulty should really be more balanced, otherwise the player gets frustrated and probably hits the escape key and quits.
The level uses a lot of trigger stuff which lets you run from one part to another and back and.. you know. This can be good and bad.
The ammo is good placed, a lot of different weapons, not too much, not too less. The enemies are also very well placed, but partwise unfair (you fall down a bit and have no way knowing there's a tuf below you).
There's one part where you see a shield and 3 stopwatches. A text sign tells ya that you can only get this stuff with cheating, which is not good. Never tell the player to cheat, as cheating makes all the fun go away.
Pros: Good ammo and enemy placement
Cons: Unbalanced difficulty, stuff that can only be grabbed with cheating
Rating: 6.5

Weapon / ammo placement:
The ammo placement was good, you don't get too much ammo but also not too less. I also like that you always get the weapon you don't need in a certain situation, so you have to search the ammo for later.
Pros: Balanced ammo placement, not too much, not too easy
Cons: probably too less ammo for some
Rating: 8.0

Enemy placement:
The enemy placement was good, not great tough. Sometimes they are strategically placed, sometimes not. However, the enemies all fit into the tileset and they aren't overused. In some parts the level needs some stop enemy events tough. The author added some hard mode enemies and I'm glad I played in normal mode. Overall good enemy placement, but in some parts a bit unfair.
Pros: sometimes strategically placed, no parts with overused enemies, all baddys fit to the tileset
Cons: sometimes unfair placement, no stop enemy events used
Rating: 7.0

Bugs:
I saw no bugs, so a perfect score for this one.
Pros: No bugs
Cons: FQUIST EATS LITTLE CHILDREN BAHAHA!!!!
Rating: 10

I hope this helps you, and I'm looking forward to the final pack.