Watermelon Game-like Puzzle

It's a puzzle game similar to the watermelon game where you merge the same characters to create bigger ones.
Can you evolve them to the very end?

Aim for the top of the rankings by scoring high in two game modes!
Survival Mode: A mode where you continuously create bigger characters to earn points without getting a game over.
Time Attack Mode: A mode where you aim to evolve to the maximum level faster than anyone else. The game is cleared the moment you reach the maximum evolution!