A tower of hundreds of physical blocks, and everyone gets to knock it down. Every 10 likes lobs a pebble, a follow drops a ball with your face on it, and gifts turn into wrecking balls that scale with the diamonds you send. Hit it with 1,000+ and a MEGA ball lands with a shockwave that shakes the whole screen. Blocks tumble with real physics, and when the tower finally collapses a new one rises in a completely different shape. It never ends.
A 3D arcade coin pusher, driven entirely by the chat. Every 10 likes drops a coin, and a gift dumps a whole stack onto the table while the pusher sweeps everything toward the edge. A progress bar fills toward a hidden target that only you can see — hit it and the gate swings open. From that moment the first coin to tumble off the front takes the jackpot, and whoever sent it gets their name on screen. Then the table resets and the next round begins.
The whole chat shares one hero and drives him deeper, floor by floor. Likes charge his mana — 25 per point — and when the bar fills he unleashes an area spell. Gifts become equipment, and the gear carries your name on it for everyone to see. Follows heal him, and if he falls, a gift brings him back. Every fifth floor is a boss with ten times the health. Here's the hook: progress is saved between streams, so tomorrow you pick up on the floor where you died today.