Is there a superior version? WiiWare is $12, PC is free. I don't really care about a time attack mode or enhanced graphics really.  
 
Seems like its a no-brainer to play the free PC version instead. Unless there's something I'm missing. Oddly though, I kind of would rather play it on my Wii. So what's up? Wii version worth it or no?

Just get it for PC, you can use a gamepad so it's no difference.

The Wiiware version fucked up the original music (it's no longer processed in real time, it's badly compressed format on Wiiware and has other issues with the looping, it was done sloppily) and has a few other issues.  I'd say stick with PC.

Where do I get the PC version? 

  @ch13696: Here you are: 
http://www.miraigamer.net/cavestory/downloads_1.php 
 
EDIT: Just noticed that page contains a link to a TI-83/84 port...

Wait for the patch, then buy it on Wiiware because SUPPORTING ARTISTS IS COOL

" Wait for the patch, then buy it on Wiiware because SUPPORTING ARTISTS IS COOL "

I say get the PC version.  Like Diamond said, the Wii version's music is bugged till it gets patched.

If you already have a PC controller, go with that. Playing on the keyboard is no way to play. And if you don't have a PC controller, get the Wiiware version cus its probably cheaper than getting a decent gamepad.

" The Wiiware version fucked up the original music (it's no longer processed in real time, it's badly compressed format on Wiiware and has other issues with the looping, it was done sloppily) and has a few other issues.  I'd say stick with PC. "