Move the mouse to change where you see it from. Press the up arrow key to zoom out and press the down arrow key to zoom in (if you zoom in too far, the opposite will happen). Press space to reset zoom.
A tesseract is the 4-dimensional version of a cube. * *There are also 4-dimensional versions of the rest of the 3-dimensional platonic solids (and one more - the 24-cell or the 4-dimensional version of the rhombic dodecahedron).