The touch screen might not be ideal for typing, but I've played zork on a two button pad (gbc) before, so... The screen would be amazing for drawing maps and keeping notes, though. I'm going to look into this.
Is it piracy if it was released for free? Not in my opinion, but I also think it's not piracy if buying it isn't owning it, and it's not piracy if you can't buy it from the original creators anymore.