Personal reflections on the design and designprocess

We did 3 prototypes (with 1 being just a sketch on paper) but I feel we could have done much more.
Our first page on the app was one of the last things we put in the last prototype but felt extremely logical when we had a clear thought behind it; this could just be a part of a larger system, which means we could had iterated a lot more. Thoughts of a "front page" had came up before but felt unnecessary until we had a goal behind it.
The design part of the course was kinda fast, we only had time for 2 rounds of a iterative process. Although the prototyping itself was also a iterative process with adding, removing and redesigning between the group.
We got very useful feedback from the other group in the feedback exercise (they did a heuristic evaluation of our prototype) and our think-alouds (I noticed a problem the second my person opened the app, something I hadn't even thought about) which just shows what I wrote before, we could had iterated a lot more. But then again, when is it really done?