Hi, I think trying to sell the game is a pretty good idea. Since you probably don't have much experience in selling software (services), just a small tip:
I read in your article that you offer a bit of support. If you manage get to make a deal with someone, do make sure that in your agreement you explicitly mention for how long you will offer support. Make it nice and short, like 3-6 months, perhaps just a few weeks.
If you are tired now, you will only become more tired if your support of the project goes on, and it will keep worrying you if there's always someone who contacts you about things of your project.
If the amount offered justifies it, perhaps find out if your university can get you in touch with a nice contract lawyer that can go over the transaction for you, but don't worry about it too much. There's not that much can go wrong, as long as the agreement is clear that everything is supplied 'as is' and the support is properly time-constrained and makes no promises beyond 'best effort', and especially if the other party is allowed to inspect the goods before receiving them, not much can go wrong.
If you are the worrying type, you could put the funds received in a savings account and not touch them for a year or so, so you'll always have funds to settle any disagreement.