Thanks :) . Orcs Must Die was one of the inspirations for this game :D
Yea I think you're right. Each room should be about a screen size or a little bit more.
The AI is smart enough to navigate mazes to get to the player/factories, but the level design and that the player can't place barricades doesn't really show them off.
I think I'll work on the project a bit after the jam with 3 main changes.
1. More levels with better level design
2. Duel stick / mouse keyboard controls instead of Gauntlets control scheme
3. Better performance.