Blackton is a real time-killer!
Great game to test your agility and attention which you want to play again and again!
Press black button and set new records!
There are three game modes:
1. Acceleration - black button appears faster and faster. The more you play - the harder to catch the button.
2. Timer - press black button for one minute!
3. Sequence - remember black button place and press it! Each new level the sequence is longer.
Program is written on "smart BASIC" for iOS programming language and is published in App Store using "smart BASIC" SDK for Xcode.
Some improvements.
+-1 
4 Puzzle 
My Territory 