Instead of randomly scribbling some things like boxes, circles and water, then calling that a scene, I suggest that you do the following:
1. Think about a subject that you would like to make a scene about. It might be a simple game, a marble race, a car race, an airplane race, or just about anything that interests you.
2. PLAN your scene. Think about what you want the scene to do, and how it can do it. Make a list on paper of things you feel that you are capable of making. The things don't need to look perfect, and they don't need to operate perfectly. They just need to be better than the kind of scribbles that a young child would make.
3. After planning what your scene would be about and basically how you think it could work, then start to build your scene with Algodoo. Try to stay along the lines of your "plan" so that you don't start to randomly put things into the scene.
4. When you think your scene is close to being finished, TEST it to make sure that it works properly according to your plan. If it has flaws or problems, try to fix them before you release the scene to the public.
5. If you do the things that are listed here, chances are that your scene will be better, and more people would play it, than if you simply scribbled some circles, boxes, and lines and called it a scene. Take your time because there is no rush to get a scene published. Your scenes will be much more impressive and people would enjoy playing them when you plan your work, and then work your plan!
You of course don't have to do it that way if you don't want to. I am only suggesting a way that you can use to improve the quality of your scenes. If you care at all about the quality of your scenes (and I believe that you do) then give this a try. I think you will agree with me that planning your work is a much better way to create anything in life. That holds true with Algodoo scenes and also with real life!
