Web game I played in grade school

years ago I remember playing a game on a website that doesn't exist anymore. It was a multi-player amongus clone where the astronaut guys were more spherical. Instead of individual tasks, everyone did the 3-4 tasks. The one task I remember is there were air bottles scattered around the map and you hat to put them in the air bottle place. I'm pretty sure imposter was the same. i remember that when you voted people out they got put in a cage and there was a key somewhere on the map.