A world with four spatial dimensions would be very strange indeed. For example, if you could travel through time, you could go back in history and meet yourself.
Or, if you could travel into the future, you could visit your planet before it was formed.
This idea seems absurd because our experience tells us that time moves forward. But if you accept that time can move backward, then you might start thinking differently about what a fourth dimension could be.
It would also change our understanding of gravity. Gravity is usually described as something that pulls objects together. But if gravity were a force that pulls things apart, then it would pull everything towards itself.
And finally, a fourth dimension would allow the matter to exist without mass. Mass is the property that makes up matter. Without mass, nothing would exist.
So, while it may look like a real possibility, in theory, there is no practical base for a four-dimensional world.