Limbo is the archetypal “scared little guy in big scary world dark artsy platform-puzzle indy game”. Personally I found it overrated. Nice enough art style, but nothing of substance - extremely basic gameplay, no plot. Just a series of scary monsters killing you until you trial-and-error your way to the next section.

I had similar experiences with Joplin. Would randomly lose quite a lot of data, and exporting to other formats was a hassle. I also cannot recommend.