Well, that's part 1 / paragraph 1 of the idea... Take over the school.
Feel free to divide the idea into whatever stages / sequels you like.
I just feel grabbing girls and pulling them into lockers just to try to catch all the girl types has already been done.
(Tentacle Locker 1, and Tentacle Locker 2).
If you are just going to do the same thing as the original 2 tentacle locker games, what's the point?
It seemed to me the Entire concept behind this reproduction of the original was to expand it, and flesh it out with some more story and context.