Add donations to donation levels

A user can choose to donate at a specific donation level for a specific project. 
The donation amount, associated donation level, and donating user id are recorded in the database.
I've been unable to get the level passed to the controller. I've tried to find a way to make this work differently for 4 hours, so I think I need to move on, or I'm never going to get a chance to try to do the actually hard stuff with implementing the payment system.