4K-tris

One software that has caught our eye is 4K-tris, a Java-based Tetris game that is completely free to play. The game boasts of smooth movement, which makes playing the classic gameplay all the more enjoyable. Moreover, the game has a semi-animated background that brings life to the game.

Aside from the classic controls that players are familiar with - left/right arrows to move, up arrow to rotate, and down arrow to drop - the game also features different levels of difficulty to spice up the gameplay. The classic Tetris gameplay seems to be flawless, which is a testament to how the developers paid attention to detail in creating this game.

Overall, if you're looking for a free and fun Tetris game to spend your time on, we highly recommend 4K-tris. The game's smooth movement, semi-animated background, and classic gameplay with varying levels of difficulty make it an enjoyable experience for Tetris enthusiasts and casual players alike.