A few years ago, I wrote a web audio game based on an old Eureka A4 game called Aliens. The original version was purely audio. I just added some visualisation to see whether it would be potentially more engaging (and easier to learn) for sighted folks. Given that I'm totally blind and not particularly adept with CSS, the visualisation is kinda crappy, but I got my kids to help me check that it at least works. I haven't had anyone with sight test it on mobile, so it's likely completely broken there and thus I'd recommend desktop for now. Anyway, here it is if anyone's interested: files.jantrid.net/aliens/