When evaluating a game, whether your own or one created by others, you want to determine some things in advance. The articles linked here provide some starting points in creating the criteria by which you evaluate games:
http://www.theknowledgeguru.com/play-and-evaluate-games/
http://www.gamasutra.com/view/feature/130745/better_games_through_usability_.php
http://mashable.com/2012/05/18/educational-video-games-how-to/
These are two different evaluation tools as examples of what you need to devise for yourself - the first is the simple example, the second more complex.
https://educators.brainpop.com...
https://www.nngroup.com/articl...
Devise an evaluation form for your game. This form will be used by your players to evaluate your game for the beta evaluation as well as the final course meeting "Game Night".