[cmaggard]

It's also available in ZACH-LIKE [0], a free compilation of a bunch of his earlier flash games. Windows-only, however.

[0] https://store.steampowered.com/app/1098840/ZACHLIKE/

[Tepix]

Zach-Like is primarily "A book of behind-the-scenes design documents from Zachtronics."

Now that the kickstarter is finished it's available for free as PDF (link in parent post)

"In addition to PDFs of the book, the digital version contains all pre-SpaceChem Zachtronics games and a bunch of early builds and prototypes, including some of the unreleased games depicted in ZACH-LIKE."