I just downloaded Soul of Darkness and Fun Fun! Minigolf TOUCH. I only played each game for an hour or so, and so far they are both worth a download.
Mingolf TOUCH has some really good graphics, and some 3D effects to go with it. The controls are awesome. You can either use the touch screen or the button layout, but both work really well.
Soul of Darkness is a Castlevania rip-off, but there is nothing wrong with that since it pretty much plays, and looks like the newer Castlevania games. So far this game has been great. And the only little gripe I have is that there is a little lag when you press the jump button, but overall I really enjoy it.