Turkey’s puzzle game maker Gram Games shoots for another big hit with Six!

First came 1010! Then Merged! And now there’s Six! That’s a lot of exclamation points from Gram Games, the Turkish company that has specialized in hit puzzle titles for smartphones and tablets.

This week, Gram Games launched the free-to-play Six! on iOS as the latest in a series of games that have been downloaded more than 75 million times. That’s a pretty good track record in the ultra-competitive $36 billion mobile game market.

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Gram Games describes it as challenging, exciting, and infuriating, for one-minute bursts or hours of fun. In the game, you face a tower of variously shaped bricks, and upon them sits a hexagonal block. The object is to get the hexagon down the tower of blocks. The lower you get, the more points you get. To get the hexagon to move lower, you must tap blocks, removing them and freeing space for the hexagon to fall into.

But if the blocks are removed unevenly, the tower will lean and crumble. If the hexagon comes off either side, the game is over.

Mehmet Ecevit, cofounder and CEO of Gram Games, said in a statement, “We are really excited about this release. Every time we create a new game, we discover some more secrets we can use in the next. We have been testing a few different games and Six! manages to pull together many elements from all of them. We expect this game to go viral: After all, it is a puzzle game that also plays like an arcade game. We always like to try something new and refreshing, whilst keeping to the game recipes that have lead to one hit after another. But most of all, we look forward to people enjoying playing it.”

The game has ads, but you can remove them by paying $4.

Gram Games formed in 2012, founded by Ecevit, a self-taught programmer, Kaan Karamanci, and Alpay Koralturk. Their philosophy was to learn continuously, be driven by data, hire the best people available to grow, and maintain their gamer roots in their corporate culture. Ecevit’s first job was as a shepherd. That was one of the ways he paid for his education.