Like, there is a whole rogue-like genre and those games are different from rogue in a lot of things 

That's up to you! 

Few points for you to consider:

1. Take a look at the past Game-like jam entries/winners. There's a wide variety
2. A top winner is specifically chosen for their "creative twist" on the original!
3. Nobody is going to stop or disqualify you for taking the game wherever you want.

With that said, I think it's worth taking inspiration from the original that's embedded/linked on the jam page. But you're free to do with that what you want 😁

TL;DR the jam is for you to learn and make what you want, above all else!