Gatenkaas by PoroCYon/K2

pcy^k2-gatenkaas.emu.gba is to be used only in emulators, hardware won't
recognise it (it lacks the Nintendo logo data, the BIOS checks if it matches,
if not, it just halts. This is the same approach as with Café Wall.) Also,
please use mGBA instead of VBA or its forks.

Hooray partycoding. 16 layers of checkerboard isn't actually that hard, because
the ARM7TDMI has a fast multiplier :)

~PoroCYon/K2

