ᐅ Planning a Bungalow on an Existing Basement: Any Ideas?

Hello everyone,

We are considering building on top of an existing basement on a west-facing slope.
The staircase is fixed, so we have planned a bungalow around it.
What do you notice about the floor plan?
Thank you very much for any suggestions for improvement.

Conditions:
To the left is south, with a street and forest. To the right is north and forest. At the top is the west side with a distant view, and the entrance at the bottom is on the east side.

Premise: Age-appropriate design. The children's room will later become an office. The office is planned in the existing basement.

Many thanks!

The area where the whirlpool is located has a basement underneath and is planned to become a terrace.
I hope this allows everything to be derived from our rough plan.

If anyone wants to see the site for evaluation:
I opened a separate thread regarding the existing structure, where you can see the surroundings and the overall situation:
https://www.hausbau-forum.de/threads/rohbaukeller-Fundament-steht-10-Jahre.33055/

Sorry for the many follow-up comments:
The dimensions on the left are 10.9 and on the right 12.5, contrary to the note on the paper.
Looking forward to your feedback.

Where should the child brush their teeth and shower?

That's right, I missed that in my previous notes: A separate shower and a standard washbasin are planned for the guest bathroom. And if she likes to take a bath, of course, she is welcome to do so with us.