Umm we ran into a lot of issues 😅.
For Anon Aadhar, we plan to include a lot of details such as mobile no, e-mail id, name, address, etc. But we had difficulties in writing and modifying a new circuit based on the existing circom files.
For The Graph, data indexing was a new domain for us and we had taken a bit more time to understand and work with it.
Garden Finance was a major problem for us as its docs had a lot of errors and was relativelty new for us. It was a bit more difficult to add more functions to it and the existing platform.