Been meaning to comment on this project for a while now, I'm absolutely amazed by how quickly you put this together, and by how much content there already is!
I am actually also working on my own remake in unity ( I know, seems like everybody's doing it ), but haven't gotten very far, even though it's taken me maybe two months to get to where it's at now. Anyway, because you've already got the gameplay down to a tee, I was wondering if I could be of service regarding the graphics side of things. A little screenshot of how Driller Night looks currently:
https://ibb.co/mzx66Q (I have no idea how you make an image show up in the forum)
I've written a few Shaders for the walls and the fluids that I think would look great in your project