I'm very excited to test out the Lizard Beta, but I had a question on my mind. If you buy the beta, will you get the release of Lizard for free/a discount? Even if this is not the case I'd gladly pay for it, I'm just curious...

Yes, the final release will just be updated files here that you can download. It's not a separate purchase from the beta.

Yes, currently working on a Steam release. Itch.io owners will be able to get a key.