It's pretty fun. I like how when you hear the howl you tense up and start using the movement of the sheep to tell where the wolf is coming from, which can lead to some false starts when a sheep moves normally. I also like when your sheep are spread out you have to make the decision of whether to go out for them or just leave them for the wolves
The following paragraph is just rambling about the things that I think could be polished if you wanted to expand the game. Just as a disclaimer I have no experience making games (beyond rudimentary Scratch games), and the points made aren't very well explained so take what I say with a grain of salt.
The first time playthrough I played it with the sound off I really wanted a way to tell if a wolf was coming, like a ! over the shepard's head. I struggled with pushing the sheep around since they were so sensitive to touch, but I like the hook on the staff being usable, though that means the sheep always end up at the bottom of the island since I can't pull them diagonally upwards with the hook. Also, it feels kind of annoying when a sheep is pushing another sheep away from the group and I push them both back by pushing the outermost sheep but since technically I didn't touch the moving sheep they just keep moving. The credits in the very beginning keeping me from playing the game one I hit the play button on in Itch.io is mildly annoying. If they were a credits option in the menu, or since there are so few of you just the box with credits in them in the menu would be appreciated. There's also a point where the difficulty skyrockets and I would prefer it be build up to. I think different levels with different difficulties (like more wolves or obstacles) or rewards would be a cool way to expand it. Also, some acknowledgement of how well you did beyond just winning or losing would be appreciated.
Basically, the core gameplay is pretty fun and I want to play more, and that's what matters most in a game jam game.