https://scratch.mit.edu/projects/222056765/

when you move in any direction (not diagonal) your speed is OK
when you move in any direction (diagonal) your speed is doubled
how do i fix it?

Well, your script says that when

<key [up arrow v] pressed?>

the sprite should move 10 steps (adding 10 to speed variable)
AND, when

<key [right arrow v] pressed?>

the sprite should move ANOTHER 10 steps (adding ANOTHER 10 to speed variable)
10+10 = 20: so it doubles the speed

The speed isn't actually doubled it's about x1.414. (the diagonal of a square is 1.414 x the length of one side)
To fix it you could use

point in direction ( v)
move () steps

but you would need a different way of moving
You could do

 
if <key [up v] pressed?> then
if <<key [left v] pressed?> or <key [right v] pressed?>> then 

  
change y by ((10) * ([cos v] of (45)))

else
change y by (10)
end
end

and so on

gor-dee wrote:

The speed isn't actually doubled it's about x1.414. (the diagonal of a square is 1.414 x the length of one side)
To fix it you could use

point in direction ( v)
move () steps

but you would need a different way of moving
You could do

 
if <key [up v] pressed?> then
if <<key [left v] pressed?> or <key [right v] pressed?>> then 

  
change y by ((10) * ([cos v] of (45)))

else
change y by (10)
end
end

and so on

Thanks, it really helped.