For me, Riven and Myst are the top two adventure games ever produced. One may need that to obsorb the following review.
The bad: Game was assembled low-rez, and the animations are jerky, I assume to keep the size low enough to accommodate as many older machines as possible, thereby increasing profit. The original release was visually much nicer than this iPad version.
The good: After so many years there is still nothing in the game world to match the creativity and style of this experience, though I have not seen obduction yet. Think about it, this game, though more like an interactive movie, contains all the elements of a Hollywood style production; trained actors, set design, costuming, audio/video engineers, lighting, script writing, etcetera. And it all comes together into a coherent and intriguing story. I can't name another game that comes close. I've been waiting for one but alas, it has not appeared. I do wonder about Rand's childhood. In the first installment he kills his sons, and the second his father who tries to kill him is jailed for life. That's rough man.
Recommendations: If the original assets are still available, bring to I-devices a re-mastered hi-rez version so we can see Riven in its original detail. Or maybe Real Riven? Now that would be something to see!
To Cyan: No one makes a game like you folks. Keep raising the bar.