Sorry for a potentially silly question. 

I never release my games until they're close to the final version, so I have a ton of games that have been in the making for a long time. This includes one that could fit the topic of this jam, which I have picked up now. The point is I cannot prove I started months ago.  Is my word good enough? 

I understand this is a chill jam with no voting and no prizes. A jam about making good games for people to enjoy, so I suppose it's no big deal. But I thought I would just ask.

Thanks!

It's a good question. After giving it a lot of thought, ultimately we will just trust each dev on their word. The point of the jam is to encourage you finish your game, not get bogged down in rules, so as long as we've helped you achieve that goal then that's all that really matters. Hope that clarifies it for you, and best of luck finishing your game!

Sounds like the most sensible thing to do. Thanks!