Hi there gjert1,
Im sorry to tell ya your map has been rejected.
The THEME is unoriginal we have quite a few maps based around minecraft blocks.
The BUILD does have a main build and does have quite of bit of detailing which is lovely to see. Perhaps adding a bit more detailing on the main build and texturing the outside would be the finishing touch.
The PARKOUR is quite repetitive and lacking in varation. It does fit the length of an easy map, but the parkour is also inconsistent, try to use more variation such as chests, fences, water, etc as hayley stated above !
Thank you for the submission, I hope to see more from you. Have a wonderful day !