Hellfire Commentaries could use this for their playthroughs if they want, but they usually keep the original music from the game and Ristar's final boss already has music. Or I misunderstand you.

You'll hear more from me. At least I will upload more. Feel free to listen.

I think I get what you mean. But the issue not with the sound quality of the instruments, but with the mix. The more instruments you put in a song the less good you can make the individual instruments sound.
Guitars are quite difficult to create in a DAW. It took me quite a long time to make them sound like this, but I'm happy with the result. They give a nice wall of sound over the entire spectrum. Unfortunately I had to use some heavy low and high pass filters on them, to make room for other instruments. Also the middle is suppressed a lot, leaving only two peaks of in the low and high. The low peak got a little drowned out by other instruments, so it's mainly a thin high peak you hear. The base guitar is very deep though. If you listen to the guitars and base guitar without the other instruments, they sound quite powerful.
The same goes for the drums. If you listen to the drum track separately it sounds very energetic. Unfortunately in the total mix you mainly hear the clicks of the attacks. I had to process the drums a little too much to make them stand out at all.
I've put links to the description so you can hear the guitars and the drums don't sound too bad. They're mixed and mastered the exact way they are in this song, but without the other instruments.
I'll listen to some of your remakes of your 8-bit songs.

Thanks! I was afraid it would be too cheesy or common.

Thanks. I can't ask for more :p