There are some limits in Greenfoot. If you want to upload your game it has to be smaller than 20MB. And if your game has to many classes it just doesn't work. But the limit of possible classes is very high I think. In my case it were about 120 classes when the game crashed.

Thank you. I don't have that many classes. I have about 20 classes. It turns out my error was that there were was a lot of coding. I put a semi colon in the wrong spot....

Without knowing what the glitches are, what action you are expecting, and without seeing ALL the code that is used dealing with the object(s) involved (from creation to destruction) from whatever classes are involved, it would be almost impossible to help you. As far as limits: as long as your game compiles and runs, you should be ok. However, if the file size of the scenario is too large, you will not be able to upload it onto the Greenfoot site. The only other problem you may have is lag (if you have an abundance of actors in the world at the same time -- meaning thousands).

I know about the lag and that was not my mistake. My mistake was that I put a semi colon in the wrong spot which kept executing the method over and over again. I originally that though it was because I had I lot of coding in one specific class. That I why I asked about how much stuff that can be put in a Greenfoot game. My game works perfectly now.... So far....

I'm actually quite proud of the game I am making! I am not a programmer at all. I just learned basic Greenfoot in highschool a couple of weeks ago. I am just taking what I learned and I am experimenting. ( I also watched about 20 videos)

Have you seen the Java tutorials. The second section on the left named Trails Covering the Basics contains lots of useful information.

Is there a way I could have a still object move after it eats something? For example I want my rocket to stay still when it spawns, but when it eats my turtle, it will move vertically upward towards the top edge as if the turtle is riding the rocket.

this is what I have so far but it doesn't work

That will only move it once. You could checking if a boolean is true, and if it is, have it move(4). Have it change to true when it sees a turtle instead of having it move in the ifCanSeeTurtle method.