I've now published the ebook "Captain Disaster: The Dark Side of the Moon" here on Itch. It's a PDF so you should be able to view it on just about any device. It's also slightly cheaper than the Amazon Kindle version ($1.25 instead of $1.39) - you can get it here:
https://captaind.itch.io/captain-disaster-the-dark-side-of-the-moon-ebook