If you want a fun game about launching a slingshotting cat through a psychedelic landscape, but don't want to pay anything, then I have good news for you! Star Cat Adventure [$0.99] is free today! You launch yourself from miniature planet to minature planet, collecting stars and exploring levels that are even trippier than the last. It's a gorgeous game, and has a mechanic that's extremely easy to use. Check it out in action:

There's not any IAP here, either, so you have yourself a nice freebie here. The game was reviewed positively by our Chris Carter, who praised the cat-filled premise and "while a lot of projects are laser focused on creating a "retro" brand, Star Cat effortlessly just injects elements of a bygone era into something that looks completely new." Check this one out for a whole lot of nothing while the deal lasts!