App Growing, Sapping Internal Memory?

Is it possible for an app to grow or continue to use up internal memory as you use it??? I installed a new Android/Facebook app named Dungeon Quest less than a day ago. Since then I have use this app on and off but I have noticed that gradually my phones internal memory has been growing (from 231mb used to 240mb)! I haven't made any of My space is now getting critical.

Is there anyway short of rooting to reclaim this space? This seems to be a buggy app. I'm wondering if its got some kind of error log file growing in my internal memory area???

 

I'm not sure what this app is doing but after watching my storage grow yet again I decided to try a battery pull reboot. It reclaimed 7mb internal memory. (That could be 10 apps).

 

+1, Thanks Kab, that did the trick. 7MB freed last night. Another 3.5MB freed from the cache this morning from the same app this morning. After clearing its cache I hardly noticed any speed degradation. This app sucks up cache space without need.