Right now, even a 1–2 point difference (e.g., 4800–4801) still gives the winner the full multiplier (+0.5), even though it can come down to tiny clicking differences.
Maybe introduce a “semi-tie” for very close scores: the closer player gets the full multiplier (+0.5), while the other player gets a half multiplier (+0.25) instead of nothing.
Possible ways to define a semi-tie:
  1. The score difference is only 1–2 points, or
  2. The score difference is within 5% of the missing points from 5000 (based on the higher score).
Example (option 2):
4000 vs 3951 → missing points from 5000 = 1000 → 5% = 50. Since the difference (49) ≤ 50, it would count as a semi-tie.