Drop Zoo is a game in which you have to merge blocks of the same color to form star blocks. When star blocks are merged, they are eliminated from the board.

In normal mode the objective is to eliminate all the blocks from the board to pass the level. There are dozens of levels to challenge you.

Also try the extra mode, which is infinite and you only lose if you let the board fill to the limit. In this mode you can compete with other people online to see who scores the highest.

Drop Zoo has an achievement system tied to your smartphone account.