I think Itch.io's refund policy is already fine / what I want. However, it's quite short. I'd like to create a more detailed explanation outlining what is refundable and what's not. My policy would largely align with Itch.io's ("You may be eligible for a refund if the product does not work or does not represent what was advertised").
But with more explanation / examples to clarify when a refund would or wouldn't be issued by me. (I think Itch.io automatically gives refunds if ppl haven't downloaded the stuff yet. So, my addition refund policy would only cover problems between me and the buyer) This will help me reduce the need for repeated explanations on kind of thing.
Based on my experience, some people buy stuff and then later ask for a refund because they changed their minds / no longer need it. I don't have time & ability to check whether it's true. So, I want to be clear in my refund policy that I can’t / don't want to give a refund just because someone no longer need it. But I’m not sure if Itch will let me say that.
(I want to state clearly that refunds for changes of mind or no longer needing the item are not granted, or will be subject to partial refunds to cover any incurred fees.)