Woaah thank you, really ! For this constructive feedback :D I'm planning a patch, I'm a bit late cause of my daily job but tomorrow I'm free so let's do that !
Yeah the same, I've so much ideas remaining ! Even if I had the time to add a lot I've felt frustrated cause of the time :))
Indicate where the enemies spawn is a really good idea, I'll add that surely. Also yeah the grass limit is not enough (+ there's a bug, the chickens should eat the grass till they're not "full" eheh) But I needed a fast solution to fix the exponential growing :p
Altar regeneration is also a good Idea. Initialy I was planning to add some blood powers, letting you uppgrade some features or summon like a "Blood rain" => AOE
If I make an about menu, I will credit you in for theses ideas ^^