How it works:
You have to find different numbers from 1 to 9 with the sum of 15 without repeating the numbers (8+7 is possible, but 7+4+4 not).
For each correct sum you'll earn points. 5 points for each number you used to sum 15 (8+7 gives you 10 points but 8+5+2 gives you 15 points).
If you find any difficult, you can press the start button and it will generate new numbers.
On the Scores screen you can check the best 5 results of the best players (Beta phase).