Scratch

I have a problematic sprite (the "fiish").
I say it is to do with movement - it is worse when it is "standing" still.
Here is the code:

When (flag) clicked:
go to mouse pointer
forever
>if touching sprite2
>>change lives by -1
>>wait 2 secs
>>go to mouse pointer
>else
>>move 8 steps
>>point towards mouse pointer
>
=============================

When (flag) clicked:
set lives to 20
forever if touching mouse pointer
>move 0 steps
==============================

Those are the only movement-related code.
It doesn't rotate at all.

The problem is it is all jerky and when I stop moving the mouse, I just want