Spiters Annihilation 4

Have no mercy and complete the level in a way, in which you drive all the monsters on thistles or other dangerous things that could kill them. Your task is to remove the base because only this gets things moving. If you remove them in the wrong order, nothing happens but you need to repeat the whole level once again. In the next rounds of the game you would have also bombs available, so the game can be still surprising.