There's obvious emulation problems that (presumably) don't occur in the native hardware. Generally I test with NP2, T98-Next, Anex86 and Virtual98 to see if any of them properly run the game.
Atashi no Pa Pi Pu Pe Po
Circuit Angel
Magical Board
The Battle Mahjong MAHJONG-JOE VS Lizard Princess
The Battle Mahjong MAHJONG-JOE VS Rabby Tonton