Trace/Bound/Turn are actually really easy if you have the game actually on your DS...
Trace sounds easy either way. But yeah the computer makes the touch screen use so much harder. I was playing Star Force Pegasus and I had to click these bubbles ("balance markers") fast enough to stay on the bull, my god it was hard to move the mouse and click that fast. And I was on a laptop BUT I BEAT IT!
i just have trouble with the no line tracing