I especially like the idea that there's no better reason to kill yourself than to get a better highscore.

I'd make a few changes, though. I wouldn't limit it to one "suicide". Make it a fast paced game and give me one me after the other and a ticking clock. The more mes I kill, the better my highscore. Bonus points for headshots and "special" kills, like punching me in my face first and throwing the dizzy me in front of a train (Or from the top of a building. Or drown the me. Or slit his wrists. Typical suicide situations.). And there should be some Jackpot when you manage to kill a me and yourself (the PC) with only (for example) 3 seconds left on the timer. Maybe something like a x3 multiplier for the last kill, making it a challenge to kill a me in a special way and to commit suicide (on the PC me) right at the end of the round. Oh, and I'd put hidden mirrors into the level (makes more sense with randomly generated levels). Shooting at yourself in the mirror could give you bonus time and make a mysterious voice asking you why you'd want to shoot yourself. The voice is your own, of course, expressing an inner conflict: There's no problem if you (the killer) kill yourself (the other mes), but it'd be a weird thing to want to kill yourself (the killer).

This'd extend the "fun" you could have with the game to an hour or two. Should be enough to give yo a weird feeling afterwards. And maybe it's even fun enough that you want to give it another try the next day, giving you an even weirder feeling.

https://www.youtube.com/watch?v=yzigcXaaMKU&feature=youtu.be&t=20

That sounds super-idiotic, and imo shouldn't be made since it could reinforce suicidal tendencies.
Not comparable to the Columbine or JFK games either imo which dealt with historical events (in a rather tasteless way).
I know of a similar game btw, where you play an East German border guard:
[url=https://en.wikipedia.org/wiki/1378_(km]https://en.wikipedia.org/wiki/1378_(km[/url])
If you shoot someone fleeing the GDR though, the game ends, and you get a message that you were tried and convicted after German reunification. So there's a valuable didactic lesson here, unlike in the suicide game.

I'll wait. :P

Valuable didactic lesson : win at the game, your HD gets wiped out.

(And, ideally, corrupted. No second life, guys.)

The game could also start with your suicide. The first twenty minutes (training missions) would then be as a public servant in the afterlife.

Actually, there's a reason that trigger warnings exist; with them, the work can exist, and those at risk for suicide can know to avoid the game if they think it will make things work. Those who aren't at risk of suicide can play the game and experience it for what it is, while those that are know ahead of time that playing the game might not be a good idea.

I don't think you understand the mindset of truly suicidal people, trigger warning or not, such a game might well attract them (almost like a kind of "trial run" experience) and push them over the edge. It would be irresponsible to create such a game.
And tbh, why would anybody want to play this? It doesn't sound like a game that would be even remotely fun to play. Just like a really stupid idea without any connection to the real world. Just like all of your other ideas for games, if one's honest.

Hahaha, how funny, typical tinyE quality.

If only one person laughed it was well worth it!

*shrug* there are off course several games already in existence where the aim is to kill the main player controlled character

Which ones?
I doubt those are suicide simulators, such a game wouldn't get made, for very good reasons.

Such as Adult Swim's "Five minutes to kill yourself" games or Staying Alive