If You Want Your Game to have Collaboration And Want the Game to have Multiple Versions Created by Different People, I prefer 1.
However, If You Dont Want Your Game to be Modified And for Someone to make a Better Version Of The Game to compete With The Original without Your Consent, i Pick 2.
The Choice Is Up to You. I Prefer 2 Right now Based on your Game state, However, If You Improve by a bit Like my Game, I Prefer 1.