Underrated puzzler gem Sputnik Eyes is free for the first time right now
Sputnik moment

Sputnik Eyes is one of those deceptively simple games. It wants you to believe that its main mechanic, moving robots on colored tiles, is gonna make for an easy game. But fear not, it gets complicated soon enough.

Furthermore, you'll also have to do it under a certain number of moves, making it a great game for those who like to get everything perfectly in their puzzle games.
Its unique aesthetic and style makes it an easy recommendation, especially now that it's free for the first time one the App Store.
It could even be Apple's free app of the week! Who knows?