For what each upgradable stat does,
-Strength for sure boosts the yellow bar (Maybe helps with slower lust gain?)
-Dexterity for sure boosts the red critical bar (Maybe helps with escaping holds?)
-Intellect for sure slows down the Slider. (not sure if there's a secondary function to it.)
A proper tutorial or explanation from the creator would be nice as to the actual values of each upgradable stat.
BTW, this means you as a player should first focus on INT. (Might be smart to just straight up spend the $100 from Missy at the library) Then break one toy per level (if your reflexes are that good.), run from the rest, until you can get the Bat and up your INT to a point where you can fight. Then when your stats are good (like 4-5), they'll be locked in that warehouse with you.