I'm a proud miyoo mini+ owner.

Here are some good games to play on it:

Everyone loves classic Tetris, until you actually play it on an emulator and find out that a lot of the QoL improvements done to Tetris over the years are missing from the original game.

But thanks to ROM hacks, that's not a problem. Rosy Retrospection Tetris adds all of those improvements to the classic game.

https://www.romhacking.net/hacks/5813/

Tetris - Rosy Retrospection

"Tetris - Rosy Retrospection" aims to combine the joyful nostalgia of playing classic Gam

ROMhacking.net

Though maybe you want a tetris with more game modes and fancy features such as color.

That's where Apotris for GBA comes from. It's a whole modern game for the Game Boy Advance that you can play on emulators and it has all the things you want in a tetris game and more. Might be the best tetris for hardcore players, ngl. https://www.gamebrew.org/wiki/Apotris_GBA

(Puzzle) - GameBrew

A block stacking puzzle game for the Gameboy Advance, with focus on delivering responsive gameplay and satisfying visuals. It follows guideline rules, so all spins, kicks and setups should work as expected.

GameBrew
Fire N Ice:
Kind of an overlooked puzzle game of the NES era. It's pretty cool. I was playing it on the Switch a while back when it released for NSO but I kinda forgot about it. But it's a rather cool game to have around in a small device like the MM+ https://www.nintendolife.com/reviews/nes/fire_n_ice
Review: Fire 'n Ice - A Fine Puzzler That's Worthy Of Rediscovery On Switch

I've got the (Solomon's) key, I've got the secret

Nintendo Life
Okay this is very annoying, the nintendo life article was full of screenshots and the cover is nowhere to be seen. And yet for some reason the embed is just the cover?