Thoughts on Rewards (Patreon)

So, I'm open to ideas about patreon rewards. It's a bit tricky to do this with a game, because I can't really give you constant content. I want the game itself to always be free.. but I would like you to feel like you're getting something out of your subscription, too. So lemme break down my ideas so far..

First, I want to update the game every 4 months. I think that gives me enough time to make sizeable updates, without it feeling like an eternity away. But that's a long time in terms of patreon rewards! So how do you guys feel about:

Bi-weekly progress updates- I fill you in on what progress has been made and ideas I've been bouncing around.

Bi-weekly polls- You can vote on things! Like what characters you'd like to see more of, or what system you'd like to see implemented in the next update.

MAYBE.. Higher tier(s) get early access to the game when it's in bug-testing phase?

Could also mayyyybe do custom sprites or short stories or something. But mainly I want to work on the game.

Let me know any thoughts you have!