looks neat! I see you've done a pretty detailed job with the city, and the room with the cabinets looks good too, even though right now it looks more like a grocery store or store-house. Libraries look kind of funny with glass in front of the books, and I can't say I've ever seen a library with a metal floor and black ceiling, but if that's what you're going for, sure.If you wanted, you could put two shelve patches on top of each other to make it even betterThe slime lake looks kind of funny, with the rock textures around it. Why not use a sky above it, and some line horizon in the distance, after a fence or something? Unless you want it to be deep in a crater. The terrain under the water looks good. Try varying your textures on that pink staircase, it's kind of hard to tell what's going on. Maybe alternate between two, or use some sort of railing or thing to set the different stair sets apart?Spiral staircase looks fine, but it really depends on where that door goes, so I can't really give you much feedback on just the staircase. Maybe consider a different texture for the front of the steps, or making the steps a bit bigger, you're clipping a line of bricks.How did those chex warriors get on top of those buildings? Do they have jetpacks? Try adding some detail to the roof, like a staircase leading up to the roof. Just a box with a door texture on the front would probably be good enough. Not to mention, your buildings have no doors or windows you can see through. With 3d floors,you can make an entire office building you can go into, and walk on every floor (not that you should do that just to have every window see-through )