Acid Tetris

Acid Tetris is a freeware Tetris clone, true to the original version. There
is only one game mode, where you guide an unlimited amount of falling bricks
to form complete rows until you hit the top of the screen. After reaching a
certain amount of points, the speed of the bricks is increased. This
difficulty level can also be set from the start in the main game menu.

There are a few features that make this game stand out. The bricks are
colorful and upon removing a line, a yellow smiley appears with a different
expression and sound depending on the amount of rows you removed with a single
brick. On the right is an overview of the amount of different bricks used.
There is a high score table and the game features both up-tempo and relaxing
music, including a remake of the classic Tetris song.