The bosses all have exploitable weaknesses, the 2nd boss in Sasha's mode is slow moving and just upgrading the rifle's attack power and buying enough ammo from Satcher beforehand will make the fight very quick. Attacking it's tentacles also doesn't hurt it, so melee weapons are mostly useless. But the game doesn't give many hints because I wanted to make a true feeling survival game that encouraged player's figure things out on their own.
Yes quite a few people share your opinion on the unfair part, if you scroll down and read. The game was started a long time ago as an experiment and became too complex as I started adding more and more ideas without proper consideration. I'm working on a different game now and don't when this will be continued, if I ever do it will receive many changes.
Porting a PC game to mobile phones is not as simple as it seems, and I believe it would be very difficult to control on a touch screen, I don't even recommend using a keyboard honestly.
Nevermind you can't fight her in the apartments but if the blocks are there she should still follow you everywhere except the first save area and the sword's building. But you have to find where she's standing and hit her with either the Sanzu Blade or using Aurora to make her attack, though it's very hard to defeat her outside of the apartments unless you use the hidden method in the first area with the hand ghosts. (You need to get her to walk into them several times)
The boss does not spawn unless it is chasing you already. If you got the sword first you did things out of order but you should still be able to find the boss in the apartments.
A lot of people seem to have trouble wall jumping, you have to jump towards the wall and keep the button held down while pressing the opposite direction of the wall. If you let go of the jump button or are in a falling state facing away from the wall it will not work.
It's scaled the way it is because the player has a low amount of HP at the start of the game, it's not as likely to last as long in later parts. The attacks do damage to clothing differently from how much HP they take also. Grabs don't do a lot of damage to clothing but take a lot of HP, where as slashes and fire tend to take less HP but do more clothing damage.
