I wonder how you guys optimized your animations to keep the size below 3 MB.

I had to use GIMP, resize from 320x320 to 64x64 and resave to get ~1-2 MB, but they seem blurry in itch.io https://itch.io/jam/lowrezjam2016/rate/62711

But there I see plenty of long animgifs, which aren't blurry. https://itch.io/jam/lowrezjam2016/screenshots

You can use the commandline tool gifsicle to optimise gifs. Just running a gif into it with the -O10 flag can reduce the file size a significant amount. It can also be used to reduce the colours or change the gif's dimensions, which can help a lot to reduce the file size, too.

Thank you! However I cannot find the -O10 in the man page, only -O1, -O2 and -O3