Thank you for your kind comment and your feedback. I really appreciated it (especially since there will maybe be a "polish" version out someday).
To answer your question relative to the theme, "don't let it out", it was the concept of the "corruption". Something is poisoning the land, and spreading. And when this "entity" reach full growth, you have to kill it before it go out and poison the world. Yes, it was a little far stretch but it's mainly because some content that made that clear (a better view of the concept of corruption of the land, the fact that the end-boss was not supposed to go toward the player but instead trying to leave the farm to go poison the world) was cut at the end of the jam and the cohesion of the game greatly suffered from it.