I understand the whole retro look of the website but it's very unreadable with the white text on bright stars background. Fortunately reader mode on Safari helped me read it.

On a similar note, a few months ago, I took over a 14 year old Objective-C iPhone app called Painteresque and brought it back to life. Discussed here:

https://news.ycombinator.com/item?id=43222099

If OP is interested, maybe I can help with the Sandbox issues or having it published on the Mac App Store?