If the same music is used in the previous and next rooms, it will resume playing instead of playing from the very beginning.
Patches for both (U) and (J) versions.
Deadly Towers (U) [!].nes
CRC32: 25225C70
MD5: F90D8365CD2A8E733E2280444B139D45
SHA-1: D59DA5BF52D5ECF5F407B70FF1C32B99235676D9
Mashou (J) [!].nes
CRC32: 454F371C
MD5: 1F5E60AAE28F24FA47E0927C49C3D17F
SHA-1: A246C3A39405E770AFDC6B0DE3EDD9937180177F