Would agree a store is probably necessary (see FPS Creator Reloaded/Construct 2/Game maker as well as Unity etc.).
For beginners I found Jorn's YouTube tutorials were essential for me to get up to speed in an applied but modular fashion.
I think construct 2 and their web site get a lot of things right for getting started and building community and resources. (You're probably not meant to mention other software but this is 2D and it seems relevant to point it out specifically).
An easy way for LW to help new users is a nice attractive splash/start page like construct 2 has. It isn't a splash as such because it doesn't go away and is actually useful. The page actually stays open all the time in a tab (which fits their tabbed interface fine). You can disable it in configuration.
There's loads of useful stuff on there.
- 2 'full' game projects (with tuts to follow)
- Many real world useful skeleton templates (endless runner etc.).
- Links to manual, tutorials, forums and store
- You Tube FB etc.
- Friendly 'Plain English' *sentence* re-iterating same info above it.
Importantly the graphic and presentation are nice enough and readable enough that I don't feel compelled to turn this of and it is still a convenient place to do whatever task you want to do on program start (new/open/recent projects). If a program is aimed at beginners or users that want approachable software then the start UI can probably be more inviting than a traditional and typical windows software.
They also provide a resource pack (as LW does) which isn't mentioned in here but seems well signposted on the web site I think .
I get a strong impression from construct (Scirra) that they have done usability testing, and acted upon it.