In the pinball game Stacktris, you try not to knock over blocks called tetrominoes by stacking and balancing them.
You get a tetromino block that keeps spinning faster and faster as time goes on. Tap the block to stop it from spinning, drag it to move it above the platform, then let go to let it fall. Make sure to aim carefully, because even if just one block falls off, you will lose the game. Don't worry if you think the game will be hard! You can use the coins you've earned to watch tips and even buy upgrades.
Have fun and good luck!