I'll let the real people do the talking, but I would say that even if they do let you, you should share a little bit of your profit with them since they made your game possible :D. They'd appreciate that I think if you did make money off of it.

Hmm... ya, it's just cuz i was thinking... You know the Droid phones? Well, if you export your game/simulation to an applet, you can put it on the Droid and it is publishable because droid is open-source and it it uses java. So i was wondering if i were to transfer the thing to a Droid, would I even be allowed to. But ya, I bet there's something about paying the Greenfoot guys some percentage of my profit :P

yeah, i didn't think so.

There is nothing in Greenfoot itself that says you can't sell scenarios or games that you create with it. The code you write yourself is your code and so you can do whatever you want with it. When you export a scenario from Greenfoot there are some things you need to be aware of, though. First, if you modify Greenfoot itself, you need to share your changes to the source (as required by the Greenfoot license, which is GPLv2 + classpath exception). This is not normally a problem since most people use Greenfoot to develop scenarios, but they do not actually modify Greenfoot itself. Secondly, if you make use of the mp3 support in Greenfoot, then you are using the JLayer library and you need to adhere to its terms. It is distributed under the LGPL license, which has several requirements (none of them too major) which you can read here: http://www.gnu.org/licenses/lgpl-2.1.html In particular, see the rules in section 6. If you do not use the mp3 support and do not wish to comply with the requirements of the JLayer license, then you should not distribute the JLayer jar file (jl1.0.1.jar) with your game. Apart from the restrictions outlined above, you are free to sell your scenarios. If you use other libraries or other people's code, you must abide by the license terms of that code. You do not need to give any portion of any income that you make to the Greenfoot team.

I don't see why you couldn't. If you make a good game, then Greenfoot or not people will like it.

By this, do you mean any sound files?

I don't think mp3 files will play directly in greenfoot. Regular sound files are good. He is saying that if you use anyone else's API in your project (for example to use other sound formats, different graphics) that you read through if they say anything about not being able to use it.

Okay, so the usual sound files that you will find in Greenfoot are okay. Thanks. Now I just have to go and export some games to my Droid and put them up for sale, hehe...

Yeah, maybe! But the only thing I have to do first is figure out how to set up a scoreboard... all of the scoreboard code I've looked at is a little too complicated for me, but that's the only snag in my success. I guess I'll have to learn a little more about how to do that.

I mean any sounds files in mp3 format. Greenfoot supports mp3 sound via the JLayer library. Other sounds (.wav format) that it plays do not require JLayer.