Hi there and thanks for playing my game. There are lots of features outstanding as you might know would happen with a game jam.
I did not build a way to delete the buildings, however that might come in the future for this game.
Also for now if you want to cancel building a certain building you can just chop a tree or a rock while having the placement thing in hand.
Thank you so much for your support and for the feedback.
PS: I added the castle building in the last hour of this jam. CRUNCH TIME!