Here's an early, unpolished, unfinished look at the work done on making the program easier to use (and three colliding galaxies).
This shows both the old interface in the upper left (which will be removed) and some of the new elements below it.
Among the planned improvements: it will soon be easier to change the intensity of gravity and use chart mode.
Details
Most displayed values will become text boxes so you won't have to enter another mode (like the control panel) to change the value. You will also be able to change any numerical text box value with a single click and drag.