Well you did nothing wrong so don't be sad, and if he knew that it was you who came up with it he would've probably never said anything...
I think you should tell him, and if he is a good father he'll apologize and probably be proud of you for standing up for yourself
You could say something like "hey dad, you know how you said when we were playing nerf guns that you wish the person who thought of this game was never born?" Then he'll probably say something like "yeah?" Or "and?" Or something anyway then say "well the person who thought of the game was me... Do you actually want me to never have been born?" And he'll probably say something like "oh im sorry i didnt mean it i apologize" or something like that...
If that doesnt work to make you feel better than im sorry but i dont know what will. But i think the best thing to do is to tell him!
