Not too useful
"Mouse Effects 4" sounds like one of those fun, promising games that you get lots of new cursors on. But it isn't. "Mouse Effects 4" doesn't really do much. It's just a movie clip that surrounds the mouse. I don't get why it deserves the frontpage, it's a pointless game.
If you ever try to make a mouse game again, keep in mind that 1 cursor that changes is like 1/10th of a full fledged mouse cursor game.