I'm in the same boat but a few weeks downriver so I can help a little but I'm cheap so most of em will be free or cheap.
Minecraft runs a couple bucks if you can stand playing it on mobile.
Vampire Survivors is awesome, kinda like Diablo on a time limit, with each run independent of the other ones with in game currency you can use to upgrade to get OP, free with paid dlcs- haven't bothered with those yet, the games huge with big replay value.
Lemmings, only played a level so far but seems Lemmingly enough to play though I'm saving it for a rainy day.
Learn 2 Fly for penguin launching- get your penguin as far as you can, upgrade and do it again.
Tetris- surprisingly available free and a decent port at that if taking some time to get used to touch screen controls.
Smash Hit, a baffling beautiful game where you chuck metal marbles at glass objects and obstacles.
Warplanes W2 Dogfight, uninspired name and a lotta the planes are behind a paywall but the controls are okayish even if the shooting is more aimbot than I'd like.
Make It Fly, a sort of build your own toy plane- only the parts can only go where you expect them to, still a decent launch-upgrade-repeat type game.
Offline Games, a games collection that has some classic games in a reasonably sized package- solitaire, Uno, Spider solitaire, zumba, chess, checkers, yet another tetris, 2048, bubble shooter and so on. Bit heavy handed on the ads though, cool math games has an app and 2048- the reason why I got either to be honest- and an icon showing that roughly half their games work on android so if connectivity isn't an issue you might go with that instead.