A problem with setInterval()

Question

After you defeat the man once , his speed rise, and Idk why. I used setTimeout(), am I missing something?

https://code.sololearn.com/WxqaGgzZ3q5c/?ref=app

Answer 1

Fixed it. clearInterval was misplaced
https://code.sololearn.com/WNtNPIGR1N8N/?ref=app

Answer 2

53.

Answer 3

Airree Where is the change? (Line)