This definitely sounds like something you would hear in an early sega mega drive game!
You did a good job on this! I'll have to compare it to the original version at some point.

The original version had different drums and an extra padding synth organ with a little echo. Otherwise, the main instruments are all the same, plus a guitar-like synth from Splatterhouse 1 (Namco System 1).

And actually, this is the YM2151, not the YM2612.

YM2151 has 8 channels and 4 operators for each instrument that you can use, including special detuning and automation/LFO effects. It doesn't have PCM/DAC support, so it was often coupled with other PCM/DAC chips (SegaPCM, OKI MS6295, K053260, etc.). YM2151 is present in the following arcade titles:

• Marble Madness (the first arcade game to bring stereo sound, 1985)
• Hang-On and Super Hang-On
• Out Run
• Power Drive
• Sunset Riders and TMNT: Turtles in Time (they used the same hardware)
• Street Fighter I and II
• Michael Jackson's Moonwalker
• Splatterhouse
• NBA Jam
• Super Monaco GP

And many others, countless.

The SEGA Mega Drive console is a simplified version of the arcade machine Sega System 16 (as far as I'm concerned), and the YM2612 FM chip in it brings 6 channels for 4-operator instruments that don't include customisable LFO or alternative detuning. Plus, the sixth channel could be used to play DAC/PCM samples, and alongside it was the SN76489 PSG chip (by Texas Instruments), which didn't sound very good, but it was left for backwards compatibility with the Master System which brought it.

I would like to mention that Modizer for iPhone and iPad supports VGM and VGZ files, and for under $4 US, it's a pretty good app. In fact, I was playing VGM's from Lightening Force the other day through Modizer.

I don't own any Apple products so I wouldn't know about iOS software. I recommended Audio Overload for Mac OSX because on the dev's website you can clearly see they're more dedicated to the Mac version than they are to the Windows version.