Thus there have been projects on how to draw shadows correctly, on what the world would look like in a cylindrical mirror, and how a camera lens distorts reality around its edge. Only as good as is needed for an agreed upon project. You will propose each project, and the proposal will either be accepted, ammended or rejected. The last usually happens when the project it too ambitious for your skills and time available. No, one project is the major one, the others can be less elaborate.
Some students make a good case to make several projects be part of the major one.
But most students prefer variety in what they do. This is an upper level, advanced math course. There should only be As and Bs. You will be warned of any impending grades below that. On the final you will have an opportunity to demonstrate how well you have integrated the five threads into your mathematical education.