That staccato at about 2:00 actually sounds intentional; you really did a good job of covering all the little hiccups and errors, because it sounds perfect to me, even as someone who's played piano for about half his life. I think you should stick with this (and stick with the staccato at 2:00, because it actually sounds really good like that) as your final product.

Get that sustain pedal fixed anyway, though (it should be easy enough to fix on your own, though - something might be loose; I get the same issue with mine, and all I need to do to fix it is to just tighten a single nut).

That guitar sounds fucking awesome - though it makes everything else sound lacking in terms of quality. Sure, it's just a tone test, but I'd suggest finding the best combination of effects and such on the drums and bass to complement this tone before going any further with it.

*hugs*

The Megaman Zero series pretty much my favorite game series (Final Fantasy might take its place though...but it has some really weak games *cough8-11cough*).

Like AuralMuser said, the pitch on the melody is too low (it's in the wrong key - sounds like a fifth off). There were a couple of missing bass riffs, but then again, you are limited by 8-bit.

Too much Dankey Kawng and not enough Dankey Kang

God, I hate her so much; she's such an annoying character. I want to see Ryuuko pull her apart, strand by strand.

Well done on her expression - it really fits how pissed she was in that episode.

The Megaman ZX influence is strong, but it still has originality to it. Very well done and the shading is done very well to give 3D feel to it. I personally preferred the Zero series, but that doesn't detract from the quality of any of the other arcs of the epic series.