Wordscapes is using 21.2 GB out of 32 GB on my iPhone5S and I am getting "iPhone Storage Full" message...

I had the same issue and uninstalling and installing helped with my iPhone storage. I don’t have that issue anymore. I believe you need to have iCloud backup. When I installed the app again, it asked if I wanted my points back from iCloud storage. I hope this helps.

I had the same problem on a 16 gig iPhone 5.

Wordscapes grew and grew until it was almost 4 gig out of 16 and bringing my phone and the fames to a messy halt. I contacted help and they told me it was one of their vendors who was using players cache and it would be corrected. It wasn’t. I bought a new phone, an iPhone 7, 128 gig, switched phones, got EVERYTHING back, all problems gone. What I thin it was was a software glitch. At some point Apple stopped updating i5s, and Wordscapes updated did a rev that 5 didn’t, couldn’t, and will never have, and the cache on your phone just grows and grows.

You are an extreme example of what eventually happens. Get a good used iPhone , any other version.