The basic idea's fine, but there wasn't really much stopping me from standing still and letting the slimes come to me, which I imagine isn't really the playstyle you envisioned. If you take another pass at this maybe look for ways of forcing the player to move.
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Admittedly there wasn't much we could do to stop the player standing in the corner and letting the slimes come to you, but 1) you will eventually miss (unless you are really good!) and die 2) I can't imagine it's much fun for the player - so they might want to experiment with other play styles. Thanks for your feedback though!