Part of my original plan was to have rigidbody desks/computers/lab equipment, as well as a few different kind of enemies - problem with the objects was that the performance of the game tanked to 5fps with them spawned in, and it looks like I still wasn't able to resolve the random crash on level load that I thought I'd resolved. Seems that the gridmap eats memory and hits a limit which causes the app to crash :(, I cut back on a lot to try and prevent it - since optimization is something I need to read more documentation on (for godot).
Thanks for the feedback, I'm glad you liked the movement :D, the gunplay was intended to be part of the game mechanics - Other enemy types were planned to fire projectiles - making a semi fast & fluid FPS bullet hell with different enemy compositions + powerups per room.
I've got a bad habit of budgeting my limited time for game jams XD. One day I'll get everything I plan into a jam, one day! :P