Could it be looked into for a category where you compete for the fastest time to die? Or maybe even 10 deaths like in Agar.io?

I don't think it would be interesting because you can very easily suicide in this game, so it would just be the guy with the fastest computer (less lag) that would get WR. If suicide wasn't allowed, then it would be a matter of hoping other players will kill you fast. In agar.io you die by going inside other players. If you go into other player lines in splix.io they die. The closest to agar.io's 10 deaths is probably 10 kills in splix.io as what you have to do (Run into other players) is pretty similar.

So I will not add it for now, but I'm still open to discution if you realy think it should be added anyways.

I see that makes sense.

Unless someone kills you. You can make a rule where you can't kill youself