yo this is some good animation but I wanna give you tips about how explosions work, you might already know but it might help Its loads of energy, so first all the energy bursts out as the main explosion as heat. It will then turn into thick smoke pretty quickly and rise up, and usually in animation fade away. The reason explosions can look like mushrooms is because the majority of the energy was already released as the top of the mushroom shape, and then that rised up while more energy is still being released from the fire the explosion left behind, creating the stem of the mushroom. If you keep this in mind you can animate the smoke easier, you know that it will rise up and shrink/separate/disappear after being released.