This week's challenge requires designing a case study builder to create UX case studies easily. Your name of the app shows that it is a case study builder. And it also allows users to upload documents, images, and other elements, which is good. Still, it needs to show how particular sections can be built of a case study, such as project background, user personas, user journey maps, competitive analysis, User testing, and learning from the project.
Visually, the blue color of the button, images, and text have low contrast. You can search for contrast checkers on the web, and you can use tools that suggest what color contrast you can use, which is easily readable and accessible.
Lastly, the name of the case builder should be correct because wrong spelling decreases user experience.
Just keep trying and learning. I wish you all the best!