A puzzle similar to the classic Sokoban, but with some surprises. There is not much to say about the setting: you control a character seen from above, that in each screen must move one or more groups of three blocks marked by a different colour, aligning them so that they all touch each other. By doing this, the walls of the same colour of those blocks will open and allow you to access other parts of the level or the exit to the next one. If you align only two blocks, you lose a life.
Advancing into the game new features appear. For example, you will have to operate switches in order to activate some mobile blocks, or to avoid enemies whose contact is lethal.
Yanga is an interesting and well put together brainteaser, with a good progression of difficulty from one level to another. Graphics are colourful although somewhat schematic, but the real weak point of this title is the complete absence of any sound. In addition to that, a system of keywords to avoid repeating all the levels from the first after losing all of your lives would have been welcome.