Emulator hangs when playing my homebrew ROM

I made a NES ROM for a Game Jam, and it's simply a Mapper 0 one: https://wendelscardua.itch.io/retropia

It plays fine on many emulators (at the moment I tried on FCEUX, Nintaco and NintendulatorDX), but one of its minigames just hangs on JSNES.

If it helps, I've uploaded a debug version of the game here: https://scardua.net/retropia-debug.nes . Debug version makes all minigames available on the first area; the one that hangs is "Mine Finder". Steps to reproduce bug: start new game, then move player to the bottom left cartridge to get the minigame Mine Finder; after that, `Select` opens the inventory; point to the Mine Finder cartridge then press `A`, which will start the minigame; when the grid shows up pressing either `A` or `B` hangs the emulator.