Once you have all the items and collected all achievements you have finished the game. You can continue playing if you want but there isn't anything to do with the money you gain after that point.
would be nice if you could view the equipment, talents, boons, etc of a character you already sent on a mission. maybe some sort of graveyard which also includes the level they made it to in the mission
doesn't seem to be anything to keep me here any longer. i have 6x total and it doesn't really matter because that is a multiplier to money and not damage (money is worth a lot less than damage because of the scaling)
would be nice to know what achievements i am working towards. sitting at 2x from the 1k clicks and need more ways to get more money because the blocks give the same amount of money per hp the further you go and the upgrades give the same amount but at a higher cost each time so it is quickly becoming futile to try to upgrade my clicking and the autoclick is really only going to be worth it when i can get it to around 1 click per second (well at least for keeping the price the same between clicks and autoclicks)
 "Idle Toy Business"){kind=icon}
 "Snake Incremental"){kind=icon}
 "Idle Invaders"){kind=icon}
 "SuicIDLE"){kind=icon}
 "Area Raiders"){kind=icon}
 "Idle Wine"){kind=icon}
 "Scrap Quest"){kind=icon}
 "Idle Block Destroyer"){kind=icon}
 "Listworlds"){kind=icon}
 "Incremental Adventures"){kind=icon}
 "Incremental Unlimited Universal"){kind=icon}
Once you have all the items and collected all achievements you have finished the game. You can continue playing if you want but there isn't anything to do with the money you gain after that point.