My answer based on your reply is the following: The gameplay is that you mine to upgrade your gear, unlocking new places and meeting new girls. Different clothes may be added or not, and this is an SFW game, so don’t expect sexual content. Upgrades that add auto mine may be added. No reason adding “selling ore”, you should collect different materials to create things. Yes, different girls want different things because they are not the same and may give you a bonus, such as breaking ores much faster, getting more materials from ores, etc. For additional gameplay content may be in the future.