Binder, the Garbage Collector only runs if you have objects which are no longer being used. I can create any amount of objects I want, as long as I keep references to them until I want them to be erased. Additionally, when the level changes the area I request the GC to do all it can to collect objects, which helps keep the load off during the actual level.
Oh and the game should work on the gallery, that was an outdated post saying it did not work. Additionally many people have been playing it recently so there might be something wrong on your end Munchor. You have the latest version of java downloaded? What is your internet speed like?