Right now, when the red text shows up for forest (yoga girl), and anyone in deep forest.
So anyone with over 300HP is basically a raid boss right now. Cause strong attack at full stamina is around 27-30 attack. Then it quickly goes down if you don't have huge stamina regen. So that's at best (about 4-5 hits) around 120-150 damage with rests in between each attack with decent stamina regen. And by then you have some kinda debuff that ruins your attack or you're out of stamina. Basically, an instant loss.
Then also by day 3-4 the attack power of most of the enemies are starting to get crazy, or the zero attack power enemies with pure lust attacks are getting up there in health as well.
The 5 points per strength up really demotivates any investment into attack power. Also, with the cost for each upgrade increasing, honestly, I believe in my opinion that's a dick move. 2 points per strength should be it. Especially because you only start at 10 attack power and by day 3 most of the attack of the enemies are already at 15 or so. Very unbalanced.
You got the basic gameplay down, it's just a matter of balancing the early game vs late game where you have all the skill perks.