This app was mentioned in 6 comments, with an average of 2.67 upvotes
Sky Force Anniversary is the original android version (remastered version of Sky Force 2014).
Sky Force Reloaded is the newer one. New levels, some extra gameplay (like different planes instead of one).
If they would think about it, I'd love to see them competing with the best one (best shoot em' up game) which is called Sky Force, and there's a sequel, Sky Force Reloaded.
Shoot 'em Ups are great for this. I'm currently working my way through Sky Force Anniversary. It's currently $3 on Steam and Free Trial/$5 full game on the Google Play Store.
You could also grab an emulator and play Gauntlet and other classics.
Sky Force Anniversary is really good.
https://play.google.com/store/apps/details?id=pl.idreams.skyforcehdtv