I think that the tiles are kinda ugly, but you were trying to create a real-life object and it's harder to make; I understand that. On the gameplay side, I think each part was just a little too cramped, and it was a bit tedious overall. That said, I think the laser was pretty cool.

Oh, also, hiding enemies under objects (aka the gauss at the end) is considered to be pretty tacky; just letting you know :p

Since you asked for advice in the description, I would suggest making your next map more open and freeform (i.e. the player doesn't have to go one way; they can choose how to get the switch and the door). This is done more easily with non-drone enemies, since turrets, launchers, and mines stay put and floorguards and thwumps only move when you get near them.

This map had some good ideas; keep it up. :)

but in the meantime here's a demo of me dying.

Demo Data	334:16777216|17895697|13|0|0|0|0|0|0|0|35791394|35791394|107405858|107374182|107374182|107374182|36071014|107374306|107374182|115483238|107374182|107374182|107374182|36071014|35791394|107374306|36071014|35791394|107374306|107374182|107374182|1126|17825792|17895697|17895697|17895697|17895697|17895697|17895697|17895697|4369|0|105644032|107374182|89474118|89478485|71652693|349252

BOMB!