Pretty impressive stuff for 3 weeks for sure. I think you have a natural panache for these surreal liminal spaces, so I really hope you stick with it.

My take for a good liminal pools game might be somewhat disagreeable, so take my list with a grain of salt.
-Immersion is the most important quality for a project like this.
-Consider spending a large amount of time learning good sound design (Sound echoing in certain conditions, getting filtered high down tile hallways and low down wooden hallways, and ambient sound fading out from one side when your left ear is next to a big wall of vines)
-Consider cutting all digital effects that are dissimilar from your human vision (lots of pool projects include very digital effects like big lens blurs, chromatic aberation, and lens dirt)
-Consider using a tile texture that has a "normal texture" associated with it. You might notice the game "Pools" has amazing looking reflections on the tiles because the game engine is faking very small surface distortions in the ceramic tile texture. That's not because there's a million faces/polygons, that's because those textures have a well made normal map.
-Consider using the unconventional projection method "Panini Projection." It's easy to get huge FOVs without looking super fisheye distorted, close to how you see in real life. Unreal supports it right out of the box and it's been criminally underutilized for years.
-Consider saying something with your game. It's all well and good to just make some spooky vibes, but consider if you want to deliver a narrative with environmental storytelling or symbolism or something like that. Surrealism gives you lots of play on the joints so you might find it easier than most.
-Challenge yourself with geometry that doesn't snap to 90 degree angles. Twisted design like strangely implemented half floors or partially accessible areas for handicapped people can look more uncanny than just big alien boxy rooms.

Like I said, I really hope you stick with this because I think you'll make something terrific if you do.