Some versions of Pizza Boy are GBA-only so may not support the GB/GBC instructions that make up the game code. There is are also free and paid versions of Pizza Boy GBC if you like their UI. Double check and make sure your version supports GB/GBC games.
The emulator I recommend for Android to play Fydo's Magic Tiles is GBC.emu. I personally use an older version called GBC.emu Free V.1.5.12, as newer versions are paywalled. APKPure is a repo of old publicly available apps and is fairly safe place to download them from.
Let me know if that's helpful!