What's a good Android game to kill time on lunch breaks that ain't full of garbage?

Look, I ain't gonna lie, it's a phone game. But the Official Millionaire Game is decent for what it is. Keeps you thinkin', which is more than I can say for some of the guys on my crew. Good for passin' the time when you're stuck waitin' for concrete to dry or hidin' from the foreman. The questions are actually kinda tough sometimes. Only thing is, the ads are a pain in the rear. I swear, half the time I'm watchin' commercials instead of playin'. And I saw one review complainin' 'bout the 'ask the audience' feature bein' wrong, so don't trust that lifeline too much. Still, it's better than nothin' when you need to unwind after a long day. Just keep your charger handy; it eats up battery life faster than a jackhammer goes through asphalt.