A free program for Android, by Rollic Games.

You have heard of the classic Tetris, the well-known and beloved block-building game in which you have to fit the falling and irregularly shaped blocks accordingly. But, what about switching things up and instead of dealing with “hard” components, you will play with “soft” and “squishy” blocks instead? That’s what the Softris mobile game is all about! In this quaint and interesting game, you have drag each jelly-like block across the field make sure they fit against each other.

However, the gameplay doesn’t end there! Softris features various challenging levels, all of which are different from one another. There are built-in obstacles you have to overcome in order to solve the puzzle.