great that you like it so far, and welcome to the V-Play community.
For your example, I can see 2 ways to do this:
1.) Use the LineItem component and add to the points array when the mouse position changes by a given delta (to avoid performance getting too bad due to loads of points added).
2.) Add a new SingleSpriteFromFile object when the mouse position changed by a given delta. The image you are using should have the color of the line you prefer and probably it’s best to make it a circle with smooth edges. This has the advantage that it is more performant, because only a single draw call is needed for all “points” along the line. However, this solution is also a bit more complex and for a proof of concept I would go for the above approach first.