The artwork is really good! I love the visuals a lot and the hack and slash gameplay as a lot of potential!
With some more time and polish this could be developed into a full game :] Having some subtle animations on the sheep even if just an idle bob would make the game feel less static and maybe having some form of knock-back effect when attacking different sheep :]
For the audio you could introduce pitch randomization before playing the sounds so that they are a little bit different even if they are the same piece of audio, mixing that with at least 2 different audio clips per sfx really helps break up the repetitive nature of it :]
Really well made good job!