The playing screen shows the 3D well into which blocks are being dropped. To the right is a pane that shows the current point score, the number of planes that have been completed, the current level and a picture of the current block as viewed from the top.
The block can be rotated about any of its three axes using the arrow keys in conjunction with the shift or control key. The object is to complete a level by occupying all the squares on that level. If this is achieved that level disappears allowing the blocks above it to drop down.
Blocks on different levels have different colours to make positioning easier. The current block is shown in outline only until it is positioned in the well.
The game also has a network option.