I would like to see a little more consistency in the style across the project. You can have multi-rooms, and even vastly different areas, but there should be a cohesion or theme to them that ties them together whether that be visual like a certain art style or from the mechanics for example all the areas are living spaces or areas you can swim in or slide down. I think your layout skills are strong, next will be pushing the level design and guiding the player around the space.
Grade: B+
Recommended Artists/Projects:
https://store.steampowered.com/app/696480/The_Norwood_Suite/
http://tale-of-tales.com/
https://www.stanleyparable.com/
https://store.steampowered.com/app/501300/What_Remains_of_Edith_Finch/
https://store.steampowered.com/app/232430/Gone_Home/