Sorry for taking this long to get the results out, I've been incredibly busy lately. ^.^ Anyway, here are the results (category scores are averages based on user votes, total is all categories added up).
4th Place: mp_dr_building_escape by @ImJustBad
Theme: 1.7/5
Level of detail: 1.3/5
Uniqueness and variation of traps: 2/5
Map flow: 3.7/5
Optimisation: 0/2.5 (No caulk)
No script errors: 0/2.5 (One of the traps throws an "undefined is not an entity" error + entering an endroom on free run throws an error)
Total: 8.7/25
3rd Place: mp_dr_metal_factory by @Cloudy
Theme: 3/5
Level of detail: 3.5/5
Uniqueness and variation of traps: 4/5
Map flow: 4/5
Optimisation: 0/2.5 (No caulk)
No script errors: 0/2.5 (Entering an endroom on free run throws an error)
Total: 14.5/25
2nd Place: mp_dr_petrichor by @jwofles
Theme: 4.5/5
Level of detail: 4.5/5
Uniqueness and variation of traps: 3.5/5
Map flow: 2/5
Optimisation: 2.5/2.5 (Congratulations on being the only person in the contest to know what caulking is)
No script errors: 0/2.5 (Entering an endroom on free run throws an error)
Total: 17/25
1st Place: mp_dr_industrial by @TheHumble_J
Theme: 4/5
Level of detail: 5/5
Uniqueness and variation of traps: 4.7/5
Map flow: 3.7/5
Optimisation: 0/2.5 (No caulk)
No script errors: 0/2.5 (Entering an endroom on free run throws an error)
Total: 17.4/25
Congratulations on the win @TheHumble_J! I'll DM you about your prize. And thank you everyone else who entered.