is it still in alpha?
I doubt you can scam as much money with C64 fans. There simply aren't enough.
Are you sure? There are still active groups with brand new games still being produced https://www.the8bitguy.com/product/petscii-robots/ Former C64 kids have grown up and now hold influential positions in society. The SID chip is still being used.
This looks great. Like a souped up Falcon Patrol 2 meets Choplifter. I can't recall seeing this before, though the rate of development for the retro 8/16 bit machines has become quite difficult to keep up with, and that's a great thing in and of itself.