An interesting one. I like the idea of the one large "journey" the player undertakes rather than a sequence of levels. I unfortunately failed, only bringing 3 followers to the very end. I feel like I was often waiting for followers to catch up with me, although their frantic behaviour when meeting an enemy was cool.
It would perhaps help if there was a way to predict the spawners more readily, as enemies can very suddenly spawn on top of you before you are able to react.
Cool submission, good job!