Ok, so I was just playing this game called Singularity on my laptop, thinking that the Internet Tablet community would enjoy this on their tablets. It is already pretty much done for you, interface-wise, except you need to make sure that it can do windowed mode, and fullscreen at the correct resolutions, and just right. Also try playing it on your computer, you'll realize text input is rare, so you only need some sort of very simple virtual keyboard if at all since the text entries are not required - already filled out.

http://emhsoft.com/singularity/

Oh, and hey go up a level on his site, and you'll realize he has many 2d games that can be ported. I think Dragon Hunt is already.

Sorry about my laziness to get a tablet