Thanks for playing! You'll be happy to know that I've fixed all the performance issues in the last build, so please give it another try.
I'll look into the snake input issues, I think I know what you mean.
Agreed on the unit sorting as well, I need to seriously rework that and will likely be adding a new screen to handle that better.
Difficulty scaling is completely changed in the new build (which is harder overall but you now have a lot more powers at your disposal), I hope you find it more enjoyable!
Minion upgrades are on our planned feature list, thank you for the suggestion!
And yes, thank you so much for the wall of text! This kind of feedback is pretty much the most helpful thing we could wish for at this point!