This is a classic puzzle-game app similar to Tetris. A tetra block is a figure consists of four squares. Tetra blocks drop and stack in a space consists of 10x20 cells continuously. You can horizontally move, or rotate a tetra block counter-clockwise or clockwise before it drops down the bottom. Once you piece together the stacked blocks in rows, they are removed. You get more scores if you remove more rows with single tetra block.

The game has 10 levels, and the dropping rate of tetra blocks increases with the levels. When the blocks stack and reach to top of the space, the game ends. In addition to the classic play, the app adds holding, bomb tetras, and the struggling time to the games. This provides you more tactics and fun when playing the game.

[Features]

Compared with the similar games, this game app improves the controlling sensitivity for mobile devices, especially during the play in high-speed levels.

- Controlling by virtual buttons, not sweeping nor double tapping. During the play in high-speed levels, controlling by buttons keeps your fingers at the same positions as possible. It lets you respond the game events precise and efficiently.

- Holding the current tetra, you can choose to release it when you really want it. It provides you the possibility of additional tactics when stacking the blocks.

- Using the bomb tetras, you can transform the current tetra block to a bomb. When it reaches the bottom, it explodes and destroy the neighbor blocks. The range of destruction relates with the shape of the original tetra block. How to rotate the bomb tetra for the best destruction relies on your consideration.