Do not add extra features, this will add risks to your successful delivery - don't jump over your head. Rather consider the following

• Unit test your solution
• Add BDD tests (like SpecFlow and Rhino Mocks)
• Implemente mutation testing
• Add some documentation: how to start automated tests, how to tun, how to install etc
• Add TODO
• Describe limitations and known or predicted issues

Also, make sure you have implemented the task in a smart way.

Do not add extra features, this will add risks to your successful delivery - don't jump over your head. Rather consider the following

• Unit test your solution
• Add BDD tests (like SpecFlow and Rhino Mocks)
• Implement mutation testing
• Add some documentation: how to start automated tests, how to tun exe and see what is going on, how to install etc
• Add TODO
• Describe limitations and known or predicted issues

Also, make sure you have implemented the task in a smart way.