I agree! You are doing quality work here, and some of us would surely like to show our appreciation in monetary terms as well.
I really appreciate that you’d be willing to pay for the games, but that’s not what it’s about for us (and I think I can speak for everyone involved) . If we wanted to make money, we wouldn’t be developing niche games for a retro platform. We make these games so that people play them. So have fun with them and feel free to give us feedback—that’s worth more to us than money :-)