If you're looking for a game similar to Qix (the old arcade game by Taito that was eventually ported to GameBoy), you'll have to keep looking. This isn't it. I thought it was, but discovered right away that this is much more akin to the old Windows 3.1 game, Jezzball. Fun in its own right, yes; but don't let the name fool you. There aren't multiple speeds on this game (remember, you would score higher in Qix if you filled in space using the slower speed, but it was riskier); there's only one speed. As you level up, the number of randomly floating balls increases…again, just like Jezzball. You can sometimes "trap" them, but more often, when you box in one of the floating balls, it reappears in another part of the screen. The game is really simple, but so much like Jezzball—and so UNLIKE Qix—that I lost interest after just a couple days. It's not "un-fun"; just not what I was looking for. Loved playing Qix on my GameBoy, and this isn't a replacement, sadly. 👎🏼
UPDATE: While the app runs smoothly on iOS 15, the controls are in definite need of help. They’re either non-responsive or hyper-responsive. I’ve lost a life by “death-spiraling” (remember that in the old Qix game?) into my own path in the few days I’ve played this on iOS15 than I ever did. Additionally, the game gets very NON-responsive at times, refusing to move when you swipe to move. This also results in loss of a life and makes this app quite frustrating. I’ll keep looking for something better…