Some players noticed that Color Switch is no longer avaliable in mobile stores. I don't know what is the reason. Try installing this game from other sources or using ShareIt to get it from the friend that actually has it. Anyway, please, do not uninstall your app, even if you take a long break from speedrunning. You might have some difficulties later on.
Greetings, Saturn
The app has been renamed on the Apple app store and is available under the name "Color", with the same developer (Fortafy). As for Google Play, I have no idea.
I don't seem to find it anywhere on Google Play. I think we, Android players, just have to wait. If Fortafy decided to reupload this game on the App Store, it will eventually be available again on Google Play.
Or, you could find it on other stores like aptoide and such. I'm sure even just the apk can be found easily if just googled
COLOR SWITCH IS BACK!! This is the Official Relaunch https://play.google.com/store/apps/details?id=com.colorswitch.switch2&hl=en_US There are only few modes currently but it is back and maybe they are starting to add more modes soon.