Gotta agree with others, I can totally see the idea behind, with a little graphical pass (maybe theme it around a sheepflock moving randomly and you are the guard dog?) and at least a score, to qualify as a score chase would elevate the idea quite well. For such short time it is well done!
Grab some free sfx and music from here an there, add a touch of delay to the ranged enemies (or I’m just bad) and you got something solid for a jam!