On emulator, the Colision just seem to not work well, on real Hardware this must not be that different.. and the result must be laggy at best.
The playfield also use some raster technics which are quite similar to the Arcade... but halas this simply diplays even more the unmasked tiles/characters from the sprites. could have been better provided the sprites were properly 4bpp coded as the "raster ink" would be used as a "sort of a mask".
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