Simple Green is my go to degreaser when dish soap and hot water don’t cut it.

If you like DOS games, ScummVM has an android app for their emulator and then you could hit up abandonware sites for nostalgia games. Works for some Win95 games as well. Played Woodruff on my phone a few years ago, an ISO file inside ScummVM, and besides the aspect ratio being a bit off it was playable.

I tend to go back to mindless puzzle games on my phone and set weird challenges for myself. I like HexaMania and InBlock by AleksDev. I paid for no ads, iirc 99¢USD, and haven’t regretted it. No freeminum b.s. in those two. (There is a HexaMania 2 by the same person, but even with paying for no ads it has a pay to keep playing mechanic that keeps me away from it.)

Flow Free is a great connect the dot series of games that you can get the full game through Google Play Pass. Hundreds of levels per game. And with it being on GPP, you get unlimited hints if you get stuck.

If you want an exploration sandbox game, there are always Minecraft and Terraria to enjoy.

Einstein Riddle by Rottz Games, also in GPP, is a good logic puzzle game.