The proto sets are fine.

About the prestiege:

Graphics are ok, but you should add more contrast to weak wire segments (cutting points are barely seen on low-contrast monitors, however they are easy to guess)

Shock theme is ok, but the overall monster selection was a bit monotone. Personally I don't like the ever-coming exploding balls. You should add more fast robots and a couple of gremlin healers.

Level setup is ok, but seems too easy. I had to practice LoA for about 10-20 times to solo, but I succeeded with this for the first time.

Fight rooms are okay, I liked the shock bombies. They also seemed a bit easy though. Maybe you could add freeze immunity to mobs.

The boss fight is boring and has no impulse. The tentacles are easy to dodge. I missed the possibility and the constraint to kill them (they could explode or shock or something), and I missed the minions, like small jelly cubes, scuttlebots or slags (like at JK, RT and FSC respectively). I also miss the waves of fight when boss fight is progressing. There can be felt relatively no difference between the start and the end.

Personal issues:

As a full-time bomber, I found the beginning of the first depth very annoying. After the first turret, there are two more of them, and a switch in between. None of my bombs reach the turrets, and opening the doors with the bucket is almost impossible. I can't hit the brick 3 times and the switch with 2 active shock turrets and exploding shock bubbles. I know, I should deal with range by bringing a gun, like swordspeople, but I highly disagree with that. All levels and all bosses can be defeated with bombs only, including the prestiege missions so far, and I'd be highly disappointed if I'd have to bring a gun for only that one situation. (The rest if the level can be solved by bombs only)

Bugs:

I got a level once with all 3 keys locked behind golden doors and no weak wires. Couldn't open them.