I wanted to design something around that concept. In fact, the last puzzle is laid out in a way so you could technically type out "right" in reverse for later use. However, major obstacle in this idea is that, whenever your cursor is ready to execute such word, you can just delete letters and type them again any way you like. For the future iteration, I thought it would be interesting to have pre-made letters you cannot remove but you can execute (like yellow text at the very end). Your idea with ignoring blank spaces and gray characters is interesting as well, although I think it could get confusing. I'll write it down for the future!