Falling Blocks Puzzle Game

How to play?
There are two operation modes: touch mode and button mode.
Touch mode: tap the screen to rotate the blocks, slide the screen left and right to move the blocks horizontally left and right, and slide the screen down to speed up the falling blocks.
Button mode: After activating button mode, you can tap the 4 buttons at the bottom of the screen to move left and right, rotate, and speed up the falling blocks.
How to score?
Players should arrange blocks horizontally until the lines disappear.
Stack blocks by moving and rotating to fill the grid.
You can keep any blocks to use later in the game. But only one block can be kept, and when a new block is kept, the old reserved block will fall immediately.
When you eliminate the specified number of lines, you will enter the next level, and the falling speed of the blocks becomes faster.
When the block stack reaches the top of the game, the game ends.