Bad! It needs a Safari browser with installed Flash-Plugin.
@Amanita: Can you upload a standalone application for Samorost 2 to play the game without browser? Flash-Plugins are not needed anymore in browsers today. Thanks!
Hmm... Yeah, that is odd. That was the version they initially had for the Mac years ago, but a standalone version does exist now—it's on the Humble Store, I know. I agree that the newer version should've been uploaded to GOG. Perhaps it was an oversight. I'll e-mail Amanita to see what's up with that, then edit the post when I hear back.
Edit: I never did hear back, but I did let the developers know about the issue.
