All in all, you can finish this game in a few hours (depending on how fast you read I suppose). I've played through it twice so far, but haven't beat it. I'm going to wait on a third time though, since similar to reading a book, I know basically what's coming next (the choose your own adventure options do eventually bring you to the same plot points, it's just a matter of how you get there and how ready you are).
I definitely recommend picking the game up and checking it out. Here's a link to the Google Play Store version, but I believe it's available pretty much everywhere.
https://play.google.com/store/apps/details?id=org.hostedgames.greattournament&hl=en
"The Great Tournament" is a 180,000 word interactive fantasy novel by Philip Kempton, where your choices control the story. It's entirely text-based—without graphics or sound effects—and fueled by the vast, unstoppable power of your imagination.
• Choose your attributes and train your skills in order to win in tournaments.
• Become a hero of the realm or use your power to take control over the kingdom.
• Unique combat and character generation ensures no one game is the same.
• Fight for glory, love, or power in the Great Tournament.
• Multiple endings with different story lines.

I've also played another game by the same company Swamp Castle, where it's all about managing your corner of the kingdom. It's super hard, but also a lot of fun :)