Very simple idea but executed quite nicely, the visuals are good and the single input is very effective.
I think a few sound effects for the bow and target would be nice as well as a little background music.
The way the arrows passed through the target felt a little unsatisfying and would have been really nice to get a good thud sound!
I think that multiple targets might also have been nice or for the one you had to get faster each time you hit it to add some difficulty. The idea of hitting the target and it being replaced with a different one moving quicker or in a different pattern would be very cool.
The scoreboard was great and i like that it records your best score as well. All in all a fun game that i did play a good few times! Also nice to see one in Unreal as so far going in order this was the first one!