Move 2d object to the mouse position on mouse click

[lofty void]

I am working on a strategy-based game and for that, I need to make my character move to the mouse position in a natural and non-instant way however when I tried running a code I found on a YouTube tutorial for this while the object did move to the mouse location, unfortunately, it would teleport and wouldn't move the whole distance to the mouse. How do I fix this issue? (and I have tried to alter speed however that doesn't make the situation much better

Original video - https://youtu.be/ZI_3yBrw9y8?si=NT8pVUvMulorQKtD (altered to gd4 by a comment on the video which I used)

[late bison]

Well, with a speed of 10000, unless your game world is really big, you'd expect the character to teleport. Try something in the range of 2 to 5.