Basic wall elements are ready. In previous code, each wall tile was a separate object, meaning 144 identical objects. Apple guidelines suggest to keep UI objects to around 100, for good performance. Add in the actual tiles, text fields, infrastructure, etc. for each player, and I was up to about 300 objects. To top it off, I implemented live resizing improperly with extraneous overhead. Now, the wall tiles are grouped into a single object, and live resizing without overhead is as efficient as can be. Drawing the actual tiles is next.