Lines 123 looks like a version of Tower of Hanoi. It's not.
The instructions are simple.
1. Move 1 tile from one column to another.
2. Then a tile will drop, always in order from left to right.
3. Combine like numbers to form larger numbers and clear up space.
4. The average game takes about 10-15 minutes.
5. The tiles at the top are randomly generated.
My top score is 9800. My highest tile so far - 10.
There is no leaderboard, which is a shame, because I'm wondering if anybody has gotten an 11.
I suspect this is one of those puzzle games that nobody downloads. It's really good.
Some of Sang Moon Joo's other games
4 Way Puzzle