I expected this to be quite a common sort of game to come out of this theme to be honest, so I'm surprised that I hardly saw anything like it
The levels were made with the intention of it being easy to know where you are, partly because it can be frustrating to get lost in a game like this, and also because a very rage-inducing game is a very bad idea for a game jam.
As for the AI, I was sort of just trying random values for their speed and kind of liked having them shoot at the player, hence the short delay before they come at you, which admittedly should be longer. The wall sizes were just to make level design easier for me. Instead of rushing to make random mazes, I just created a grid and then erased some walls and I had a decent maze.
I did also have the intention of adding multiple different types of distraction, similar to the ones you suggested, although with just 3 hours, it seemed like quite the over scope. I also originally had the player go to pick them up, but then as soon as they did, the enemy would be free and bolt for them, so it didn't work out.
In conclusion, thank you so much for your feedback. This is an idea I'd like to expand on, and your suggestions have really helped me with thinking of some ideas. And don't worry, the door wasn't ever really clarified as a door, I'm sure you won't be the only one.