In the upcoming update we plan to add achievement window where over 100 items grant you points marking the completion of the game, also there will be many usages for existing items collected over time as story progresses. Eg. tools, or if you screw up you will be use some items to conform the girls. (Like chocolate, flowers, or even condoms, it will depend on the girl) Some progresses could be used to unlock secret sex scenes. (currently not in the game, but planned idea - Eg. your choices will end up with someone in the bed, but it will happen only if do something, like using a vent with screwdriver with nerds will let you spy on the girls in the showers, etc.)