Add supports to the base that the level is on. It needs it. As it stands, if you happen to slash the pillars enough or a monster blows up all three's connection to the platform, the whole thing collapses into the lava.
Great level, one of the most creative I've seen so far and it takes advantage of voxels (minotaurs smashing the ground and the pillars thing). You should add more swarms though, I was able to beat it after a few tries only.
@Jumbify if the point is for the whole thing to collapse, I guess that's... good? Seems like you end up relying a lot on luck to finish, whether or not a minotaur is going to end the level for you or not.