I think this needs some refinement. The attack animation slowdown on hit was done intentionally—it’s part of the "impact." If this effect is strengthened, the hit will feel even more "physical," considering that we’re just clicking a button. In general, this is used in many games.
With the next project, I’ll need to explore this in more depth to make everything feel enjoyable and fair.
And yes, damage is dealt once per enemy. Thank you!