The corridor to the rooms will become pitch dark at a length of > 8.50 m, and it is also too narrow. What are the various rooms for, do you have many children?
That wasn't an architect, was it?!!
I used the program myself just to mess around... there are major mistakes in this drawing, walls were simply drawn without any plan and doors placed.
If I were you, I would google "Winkelbungalow Grundriss," there are various examples to use as a reference. On the approximately 129 sqm you are planning, you can definitely do a lot.