썸썸플러스(SumSumPlus)

It offers 4 game modes with a total of 100 levels.
Each level has only one solution.
Exercise your brain and prevent dementia by playing simple addition puzzles';
'How to play:
- The numbers in the top and left rows represent the total. Find numbers on the board that can be added to make a total.
- If you find the correct number, a circle will appear, and if you click on the wrong number, a heart will disappear.
- If you find the sum of both the top row and the left row, you are successful.
- When you need a hint, click the magnifying glass button and the hint will be displayed after using one heart.
- When all hearts disappear, you can add 3 more hearts after watching an ad. Hearts are created once every 30 minutes.
- You can change the game mode from 4x4 to 7x7.
- Each game mode progresses through 100 levels step by step. To skip a level, click on the level you want, watch the ad, and then proceed.