Thanks for playing, the feedback is really appreciated! I agree some major balancing changes are needed. I'll admit I've never played a TD game before so I don't have a super strong grasp on what makes a mechanic good or not. As for the art/animations, I am not an artist. It takes me a long time to make an asset that looks halfway decent, and even longer to animate one. That's something I've been focusing on for the Marathon Jam version :)
To answer your question about the sacrifice mechanic: if you keep the minion 1 hero gets added to the play field. sacrficing the minion won't spawn a new hero, but just gives you less to work with. It's sort of a last minute thing I came up with while trying to find consequences for ignoring calls. Definitely going to be refined in the full version.