I need help in embedding projects / using the code in the KA template

So I made a project I'm really proud of. I wanted to embed it onto a website because I didn't want people to edit the code and all, but if I embed it without the editor, the thing only has 400px height and 400px width. And there's no scrollbar.

So I quit trying to embed it. I decided to use the KA template to put it on a website. When I did it, I tested it, and it lagged and crashed at literally the second scene.

Here's the program: https://www.khanacademy.org/computer-programming/fruit-flys-fabulous-feat/5243674011058176

Is there any other way to put it on a website? If not, is there any way to make the methods I've tried work?