Sprites & animations are cute, And it gives off the ittybitty lil' mayhem vibes.
The whole one spear throw/retrieve method feels well done, Making the players to consider both their position and spear's position every time they attack is not the hardest brainsqueezer but subtle & sweet design, Very high adherence to the theme, only one.
Also, Snatching off that little health potion in middle of utter mayhem feels really goooood..
But I think the zoomed out view makes me harder to keep track of everything. (or maybe because I lack the GamerVision[tm] and generally suck at overall gaming lol)
About originality? I've never seen topdown games with shoot & pickup with one ammo 'til now, So I'll give it a good score.
Generally, It was short but fun experience!
Oh, And there was some minor glitch when I picked up the health potions, It said Unknown instance ID : undefined (possibly you've forgot to refer to the spawned instance somewhere in your code?)