I contacted them, and after some weeks of chatting and doing things here and there, they said they couldn't increase the size limit. They can only increase the size limit of the other updated files, not the limit size for the online version.
But! After finishing the improved version of the bears and the fitness girl at the park, I removed old assets, and guess what? The upcoming version 0.36 will be able to be played on itch.io because it decreased its size well enough.
