The demo's about 460mb. For some reason you get told the controls some way into the demo. As is standard, arrows are movement, Z is confirm, X is cancel/menu.
F4 toggles fullscreen, F5 takes you back to the main menu instantly. The first ON/OFF option in the options menu toggles auto-sprint. Thank god for that.
One thing that already makes me like this a bit better than Sneak in Desperada is that the combat rape animations continue while you're deciding what to do for your turn.
The first enemies you encounter just attack, and there's no game over stuff until you reach the... junkyard place? An area to the north of the park where you beat up redheaded guys until they all go away and NPCs come in. There's a girl there that you need to fight to rescue, and this fight is where the first combat rape can actually happen.
Some enemies can attempt to tear your clothes as one of their abilities, and if that succeeds twice you're vulnerable to sex attacks. You get what I think is some sort of rock/paper/scissors thing to break out, but you seem to be stunned for a couple turns afterwards.
After you beat that and go north again (the far left trash can disappears) you go into a parking lot place (and get told the controls) where there's enemy encounters and if you lose you get a CG and get sent back to the nurse's office. After a couple losses, photos of the heroine get put on the board in the school lobby, next to the big blackboard.
There doesn't seem to be anything like 'three strikes and game over', but the scene does change a little. When you enter the bad guy's territory, you can see some naked girls on the roof, which I assume is simply a counter of some kind since you can't get up there, but it caps at four girls.
Not sure where I picked it up, but I got like 50 poison items that instakill you. Pretty sure that was in the last RPG Maker demo too, so it's likely a tool to get to the scenes quickly.
The demo ends when you find and beat the baseball bat guy. If you lose to him, there's a scene, then you need to sneak around people that will insta-capture you. I don't know if there's a way to get your gear back though, and if you lose to the bat guy again, it's a bad end.
tl;dr: Good demo, and I reckon I'll be buying this when it comes out.