A source of many free unusual short games which I recently stumbled across as a result of having purchased on Steam one of the few commercial offerings (Stephen's Sausage Roll - a fiendish puzzler) https://www.increpare.com

Try (for instance) the multi dimensional version of Tetris!

See also https://en.wikipedia.org/wiki/Increpare_Games

Thanks so much for the links, Lex!

Thanks, Lex! I will add it to our Free Games Galore section!

Thanks Lex.

Thanks Lex!