Brain Sum plus

Brain Sum is a new type of brain puzzle game you have never experienced so far.
Enjoy a brain puzzle game which you can never quit once you start.

[How to play]
- Add two blocks to make one new block
- The sum of the two numbers must be less than 6
- Condition to eliminate the block
: When blocks with the same or bigger number are connected horizontally or vertically,
the blocks are eliminated (nonetheless, 1 is an exception. 1 can only be added)
- When there is no more block to add, the game is over.