Jacks is an addictive game of quickly picking up given numbers of objects. You can play a game in a short time. Develops counting, pattern recognition, and hand-eye coordination. Simple and straightforward, but can be challenging.
Interesting natural and musical background sounds, and a choice of game noises of natural or synthetic origin. No ads, no permissions. Written by a person.
You can play Jacks to appreciate the sights and sounds, or more for the score; then speed matters. If you're like me, it's easy enough to recognize groups of 2 or 3 things, but it gets harder as the number gets larger. You can count them, but that takes time. In the higher levels the objects change color to distract you, and then start moving so time is limited.
Customer service website: http://jacksgamehelp.blogspot.com
Have fun!