How do I keep a sprite upright?

AllanR, (How do I limit the number of objects in a layout?) that worked great thanks so much. I have another question. I have some balloons that move within a box and collide with the walls. I want them to stay upright in the box, well no more than 20 degrees upright. Right now they bounce all over the walls and some of them end up upside down. (kinda strange for a balloon don't you think?) well let me know what direction I should proceed on this.

I'm just dropping in on an apparent series of questions, but I think I can help.

I am going to assume you are using a behavior for the movement of the balloons (probably bullet), click on the sprite, on the properties window, search under the behavior and look for "Set angle" select the drop down menu and click No.

Thanks! it worked great!