Merge the fruit, grow the watermelon. That is the whole premise of Watermelon Merge 4, the fourth game in a series of fruit-merging puzzles. You move a fruit left or right, click or tap to drop it, and when two identical fruits touch they merge into a bigger one. The biggest prize is the watermelon.
The space in the box is limited, and the game ends if fruits pile up above the line. So it is a game of balance: big fruits at the bottom, similar sizes grouped together, and always a thought about where the next fruit will roll. Each merge gives points, and the levels bring new targets. 2048 Classic is the older sibling of this merging idea.