Woah this game has an amazing concept, great gameplay loop, and fits the theme to a t! i love the twist on the standard shooter/assassination game, and the challenge of needing to set yourself up for future assassinations! The only suggestion I'd give is to restart from the current iteration (e.g. one of the future selves trying to kill the older selves) instead of restarting from the very first run of the loop by default. I get that you'd need to be able to restart from the first run in case you make it impossible to assassinate your old self, so you can give the player an option to restart from the start of the loop or to restart from the current iteration. Great work!