Puzzle IO - Binary Sudoku

I have played this daily since finding it a few weeks back. I even splurged for the ads-free version (reasonable one-time fee). The gameplay is deceptively simple to learn and enjoyable for logic and puzzle game aficionados. My only complaint is a glitchy interface combined with an automated “error-check” that utterly fails at distinguishing between genuine user error and said glitchy interface. Simply explained, there are only three options for each cell: circle, X & blank. One tap is circle; two taps, X; & three taps is back to blank. Often there is a lag after a tap. Unsure if it didn’t detect it or if it’s just lagging. I frequently tap four to eight times to get my choice. Slightly clunky, but not gratingly so. Unfortunately it’s straight up problematic if I’m working on the last empty cell in a row or column. Regularly the wrong option is easily read as an error. (By this I mean, the line is checked before my final tap.) One error equals the loss of the three lives allocated for each game. I’ve adapted by forcing myself to slow down and focus when working on the last empty cell. Though this reduced my official game errors, I’d prefer to either be asked if the line just completed is ready to be checked or simply to have a separate way to submit it once my choice is correctly displayed. I also stop playing the game each day the first time I’m prompted to earn new lives because of interface errors instead of my actual mistakes. Again, the actual game design is visually attractive and fun to play.

I love, love, LOVE this game. I love to mindlessly play it because it helps my brain focus on what i’m hearing. Another time i really like to play is when i’m trying to fall asleep. With my phone even on it’s darkest setting, it’s still much to bright to play when I’m trying to wind down since the game uses a mostly white background. Not only would adding this feature integrate the app more seamlessly with iOS, but it would make it look a lot more professional with this useful, new feature, putting it further above similar apps and making it the obvious choice for users! I’m a teen and I’m not huge fan of going on social media while i’m around others (because I don’t pay attention to them) and I also have no other games on my iPhone, leaving this app my go to option for really any entertainment. I alone have made you guys a decent amount of revenue just from the ads I watch between puzzles, so the least you could do is make a game-changing addition of dark mode for your biggest money maker :) Other than that it’s a 5 star game all the way.

This is the best version of this game I've found. Sometimes the color correct answer doesn't show up, it just spins in black and white; but a minor glitch. It's good for quick games! But, why is the hard version harder than expert or nightmare? And why is nightmare easier than expert? Seems counterintuitive.