Bit of a plug here for another new release of ours... The Penguin Factory, a 3D puzzle game is now available on Steam for PC, Mac and Linux:
https://store.steampowered.com/app/486180/The_Penguin_Factory/
For those that remember On A Roll 3D's Steam Greenlight days, The Penguin Factory was in Greenlight shortly afterwards. Whereas On A Roll 3D took a few months to be released, The Penguin Factory has taken the best part of 4 years! But we've finally finished it!
Anyway if you're interested in a puzzle game with 100 challenging levels (plus a level editor) and deceptively simple controls, check it out.
If you're also a fan of hitting penguins dressed as Santa Claus with giant wooden mallets, it has that too :)