Hexologic is a puzzle game where you put up to three dots inside of hexagons to reach the requested amount sets by the game. Let's say that it's small mathematical problems and by such it's not the most complex thing ever while at times being challenging when reaching the lasts level.
This game is nice to entertain yourself when you have something else to do aside, which is exactly the way I played it, aka while waiting for my RP partners to answer after me (and because of that, the time I spent in the game is inaccurate, you need around 2:30, 3:00 to finish it).

Pro:
- Simple enough rules to be understood without words.
- Nice learning curve.
- Quitting the game for some time will not have you needing to relearn everything from the beginning.
- Bonus level created by players.

Con:
- The lack of words to explain everything is a problem when it comes to the easy vs expert option. A green square next to a red square doesn't explain what it changes to the gameplay.
- There is no option regarding the sound. While the music is nice, I now have an earworm.
- I didn't notice the hidden level before reaching around lv60 as the area you need to click on is often at the beginning of the level and don't show anything while you have them on the screen.
- Before finiding the hidden level, I had no idea if I was doing 90 basic level before reaching the area specific. Yes the background is different, but once more there is nothing written and with the absence of achievement for each area, lead me to ask myself if the background was related or not to the according name.

I'm really nitpicking with the con as they are absolutely not detrimental to the gameplay.