Nice loop. I like how the emote turns bright yellow before it floats up.
Not a ton to comment on. If I had to nit-pick (and it's small, really), the yellow of the helium filled emote is a bit saturated. On my screen, it loses all of its shading. Also, the bouncing seems a little choppy. Perhaps a small adjustment of the framerate.
Again, both of these points are really stretching and looking for something. I think it's fun and well done and really is great the way it is.
Thank you! I'm working on a background for it (though that's been set aside for a short time) and when I add it I'll see if I can't tweak the animation a bit.
Color issues are tough. I know from my photography that other people quite often don't see the detail or accuracy I can see on my monitor. I was showing a relative of mine what I do once and was horrified at what their display showed!