How to make this more alien/tyrannid themed.

I've been wanting to build a war gaming table for so long, and after 10th edition it felt just right to make one.

Its my first table Ive ever made so keep that in mind. I went with styrofoam instead of polystyrene due to cost at Lowes.

My vision is a base with alien overgrowth. Huge pulsating oozing piles of slime and organic matter. I'm adding 3D printed tucks/cars to be scattered around. However my question is; what else can I add to make it more alien themed?

Trees with tentacles? High ground like walkways covered in slime? Abandoned town/out post?

I have modular pieces of terrain I made to add variety to the base. It's the pink/purple foam in the pictures. Feel free to ask questions or steal ideas lol. Thanks in advance!