It's definitely taking almost all of Ritsuka's attention to continue dodging. She considers using another illusion, but no, the same trick probably wouldn't work twice... Still, she needs to do something, or even she'll risk potentially literally slipping up on the increasingly wet and/or icy ground.

She pauses for a brief moment during a lull, concentrating on something, then leaps out of the way of the next snowball. Though... is she possibly moving a little more nimbly than before? It's probably nothing. In nay case she's doing her best to try to close the distance. Maybe she can herd him close to the edge of the raised platform to corner him?

That said, exciting as all the throwing things and dodging them doubtless was to watch at first, it might be starting to get old now.