As you can see in the screen shot below, the legs of the walking people are not displayed correctly:

I don't know if this is a mapping issue or if it is a CPU/PPU timing issue or if the game uses some rarely used NES feature. The ROM is marked as 4-screen mirroring even though the ROM supposedly controls its own mirroring and it should never be able to use 4-screen. If I force it to 4-screen, it actually does improve things slightly (the animated SACHEN logo looks correct when set to 4-screen, but the rest of it is about the same).
The wiki mentions that it may contain inaccuracies.
This video demonstrates what it is supposed to look like.
My emulator and FCEUX look about the same. Nestopia gets the walking legs to appear, but other parts don't look right.
Edit: The sprite 0 hit occurs on scanline 15, close to the top above those mountains (see the white pixels in the upper-right). I assume it counts cycles or something to figure out when to split the screen.

I don't know if this is a mapping issue or if it is a CPU/PPU timing issue or if the game uses some rarely used NES feature. The ROM is marked as 4-screen mirroring even though the ROM supposedly controls its own mirroring and it should never be able to use 4-screen. If I force it to 4-screen, it actually does improve things slightly (the animated SACHEN logo looks correct when set to 4-screen, but the rest of it is about the same).
The wiki mentions that it may contain inaccuracies.
This video demonstrates what it is supposed to look like.
My emulator and FCEUX look about the same. Nestopia gets the walking legs to appear, but other parts don't look right.
Edit: The sprite 0 hit occurs on scanline 15, close to the top above those mountains (see the white pixels in the upper-right). I assume it counts cycles or something to figure out when to split the screen.