This app was mentioned in 3 comments, with an average of 1.00 upvote
I would recommend Space STG III. It has PvP and single mode. https://play.google.com/store/apps/details?id=org.ovh.SpaceSTG3&hl=bg&gl=US
Space stg is a neat little game I found a few years ago
https://play.google.com/store/apps/details?id=org.ovh.SpaceSTG3
Also Space Corsair! A fun little time-sink
https://play.google.com/store/apps/details?id=fr.testudo.spacecorsair
How about this SpaceSTG3