네, 특히 저같은 경우는 이것 때문에 프로그래밍에 재미가 붙어서 말입니다 (초보자로서 특히 이것이 잘 맞아주었습니다.) 그래도 한글 언어 지원이 되는것이 확인 되었으니... 뭔가 만들어서 한글 자막 옵션이나 더할까나...

네, 특히 저같은 경우는 이것 때문에 프로그래밍에 재미가 붙어서 말입니다 (초보자로서 특히 이것이 잘 맞아주었습니다.) 그래도 한글 언어 지원이 되는것이 확인 되었으니... 뭔가 만들어서 한글 자막 옵션이나 더할까나...

Here are several suggestions. First, get rid of the white background: You can either use GIMP or Paint.NET and use the magic wand (or in GIMP's case, simply go to the Color Menu and select Color to Alpha, and since it is white, simply press ok) and get the checkered background to indicate transparency, and SAVE IT AS A PNG format. (jpg and bmp does not handle transparency) Secondly, with scrolling since the new Greenfoot allows for easy scrolling, you just have to do something along the line of setting some variables to store the "camera" value if going for a thing that doesn't stick to some object, or set a world variable so that everything moves relative to the object in question. Thirdly, for the sound you might want to check its format, and see if it is compatible to Greenfot via the tutorial page. Hope that helps.

Yeah, I think this is a Greenfoot limitation caused by Greenfoot's design. I'd think it's going to be difficult to circumvent that, seeing as I tried max speed on an i5 and it still yield that error. I am not that fast of a typer, so I just wanted you to notice that. Cheers to you. :)