Fun game. I played for far too long because I was trying to figure out a way to farm gold really fast. I did end up with max mana regeneration, both of the books, and like 30 hay. It’s pretty relaxing, which is probably why I played so long.
(This is a side note for all gamers out there. It seems like the best strategy to get gold without a lot of work is to buy the polymorph book and single hay, and take one sheep to level 20 or higher. Push the sheep in the top right corner or bottom right corner and put hay in the pin. As the monster runs towards them, shoot them when they get close enough to be attracted to the hay. They will just walk into the goal themselves and you get easy money).
Some small critiques: It would be nice if there was a larger benefit for saving more sheep per level. As far as I could tell, 1 sheep is 1 gold no matter what. But it’s a lot easier to take 1 sheep for 20 levels than it is to take 2 sheep for 10 levels. Some bonus for saving more sheep would be nice.
Overall, nice job. I enjoyed the game quite a bit.