64K Challenge is a free puzzle game developed by App Monkey 101 for Android devices. The game is designed to test your brain and IQ, challenging you to strategically sum up numbers to 64K by doubling up from 2 to 4 to 8 to 16 and so on. If you get stuck, you can use power-ups to help you out.

The game has a simple yet addictive gameplay, with great chimes, sound effects, and relaxing music. It's an excellent game to pass the time while commuting to and from work or school. You can challenge yourself, friends, and family to reach the number 64k and see who can do it the fastest.

Overall, 64K Challenge is a fun and challenging puzzle game that will keep you entertained for hours. If you beat the game, make sure to leave a rating and feedback for the developer. Plus, there are no annoying ads to interrupt your gameplay!