This target can be simple in play x number of letters to guess the phrase or play a certain block of letters. There are various power ups you can use along the way to help you complete your target & try to three star the levels.
I've nearly completed the Paris stage (currently on stage 27 out of 35) before I travel to London. It is a 'free to play' game but I've felt no need yet to purchase any of the in-app purchases to advance.
Yes, I’ve returned to another incomplete game to finish it off. Technically, I had already completed it, but I’d not managed to finish Special Mode which is unlocked after reaching the end of Arcade Mode. I’d had a couple of attempts, but failed. Unlike Arcade Mode, you can’t restart from any previously reached stage on Special Mode – you have to start from the beginning each time. Annoyingly, I’d reached the final stage on one of my attempts, then lost the last of my lives.