Oh dear, people are actually playing on abstract nonsense, the difficulty I added because people said my first game's "hellish yard" was too easy X3
And I'm afraid not, unless Z was the only key I could map it to that wouldn't cause trouble, If I mapped it to Space or Enter it broke gamepad compatibility. It also didn't allow me to map it to keys that didn't already exist. I may have to find a dedicated coder for this one.
-Edit Turns out that I long replaced the plugin that didn't have this flexibility. I can actually fix this! I guess "S" would be just as good a button for a "smartphone" as any.
Thanks for the fix.
For the second battle, I have a feeling the story is supposed to progress no matter who wins, but I won on my first try.
The third battle is indeed an optional victory battle. Even with the cookie, which can be used before a fight, I feel like the enemy's damage wasn't reduced that much and it took me several attempts to win. It's possible on the hardest difficulty with regen effects and Rin's speed buff. Sadly, Rin didn't confiscate the boss's weapon for her own use.
Edit: I beat the demo and did as many events for the party members as I could. Hopefully, this doesn't lead to a yandere ending if I try the same thing in the full release.