0.4 was - I believe - meant to serve as a skeleton/framework for areas and events to be added later. It also added a shower scene, which was hot and laid the groundwork for the Inventory and Skills menus. There's actually a ton of work going into this with the modelling and keeping the writing suitable for the characters. Couple that with the moneymaker (ROFL, brilliant) and the introduction of a teacher (next build, I think) and parents (later down the line?) it's impressive to see new builds being pushed every month.
I do agree, though. There's little in it thus far, but we can expect a much fuller experience later. Similar games? What, like voyeurism or incest-related?