It's good, but I'd recommend using this for the motion of the squirrel:
<when green flag clicked>
<forever>
<if> <key[ right arrow ]pressed?>
<change x by( 3 )>
Then, after the if block put
<if> <key[ left arrow ]pressed?>
<change x by( -3 )>
That should make the motion smoother
Hope it helps.

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