that alien fish finger game looks -amazing-. checking it on youtube and love what im seeing!
...and i've never heard of it before. That is going to be the main issue for any indiedev today who wants to release something on amiga. Regardless of exact amount of potential users there are it will be a lot less than say pc etc so its absolutely imperative that you find them and let them know.
Things like a retweet/share from official commodore social media, mentions at conventions, etc... would go a long way I think. Thwacking a post up on EAB is a good start but I'm only here because its the first result on google when i first searched "amiga forum" - theres plenty of other places people are hiding! Emulation scene is a massive one to advertise in if not release to! etc etc.