PAL and NTSC versions available!

I have produced two different versions of the game for a better hardware compatibility.

The game sound and speed were adjusted according to the different frame rate of NTSC and PAL.

Although the choice of the ROM might not affect the emulation (you can choose what region the ROM is in different emulators), 

it will affect gameplay when running the ROM on original hardware. 

Changelog: 

- Added NTSC version 1.6

- Added PAL version 1.6

Enjoy!