ONO: Think Straight

Fun! Fast! Free! Unique!
Start a chain reaction that will clear all the O's from the screen -> ONO (no O's).
A new type of hybrid casual puzzle game. An overlapping maze. Like Sudoku without numbers. Wordle without letters.
Starting with the simplest forms + rules, complexity and variety emerge as elements are added in larger puzzles.
A fun easy way to work on your clarity, focus and working memory.
24 levels from very easy to very hard. Master each level by solving 4 puzzles - you are allowed three tries in each of the first two, two tries in the next and, finally, you must solve one puzzle in a single try. The level is then open for free play with three tries forever. 
Ads only required for bonus rewards (but please get some rewards, we are both rewarded): 
You have an opportunity to watch a :30 ad to unlock a level, additional stickers, and/or to get 2X points to help you run up your score. 
Unlock everything for just 99¢!
Larger levels have 1000's of puzzle variations making ONO a game you can play over & over.
*Hat tip to "A Thousand Brains" by Jeff Hawkins for game inspiration, you should buy this book.