The README file os out-of-date.

[latsa]

Specifically this link (1024) gives error 404, and this link (Saming's 2048) redirects to something unrelated. Maybe you would like to update or remove the affected line of text?

[Crystal-RainSlide]

That will be:
https://web.archive.org/web/20140920221308/https://play.google.com/store/apps/details?id=com.veewo.a1024
and:
https://web.archive.org/web/20150408044005/http://saming.fr/p/2048/

Sadly, http://www.veewo.com/games/1024/ is not archived, only the trace of its existence. Veewo don't keep their history on their website. One might contact them though.

That's also true for https://github.com/saming/2048, but it might just don't exist, since there is no proof of its existence.

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Another link can be added is Threes by Asher Vollmer.