Scratch does not do many things well at all. What I am about to list are just the tip of the iceberg about what it cannot do very well. First of all, the graphics are awful. Scratch only renders in what I can tell as 480p or maybe even 360p. That was definily HD - in 2005. Also, Scratch cannot render 3D graphics. Scratch should be revamped also into HTML5 so that It isn't so demanding on my laptop as well. I would also add a feature to debug our scripts better. And finally, the mouse input is purely just shameful. It is so inaccurate and noticeably awful that even simple games turn out very badly. These, like I said, are the tip of the iceberg of what Scratch does terribly.