What's a good Android game for keeping my mind sharp with word puzzles that I can play even when I don't have internet access?

So, I was looking for something to keep me entertained during my summer vacation, you know, when you're out camping and the Wi-Fi is spotty. My students showed me this 'Word Riddles - Offline Word Ga' game. Took me a few days to figure out all the features, but once you get the hang of it, it's surprisingly intuitive, even I could figure it out! The best part is that it works offline, so I can play it anywhere. It's like having a teaching assistant in your pocket, but instead of grading papers, it's giving you brain teasers. I like that it's not just mindless tapping; it actually makes you think. I've even started using some of the riddles in my class to get the kids thinking outside the box. Why do they hide the settings button there, though? Still haven't quite figured that out. But overall, it's a great way to pass the time and keep the mind sharp.