I have a love hate relationship with this game. In general, it's great. I do feel however that there are times where the difficulty of passing a level suddenly becomes incredibly harder than previous levels or even impossible. It's due to the spawning tiles occurring on a level where the requirement is joining pips on already placed tiles. I really want to like the Daily Runs (my friend and I have been playing them a lot) but we both feel the run stops (almost every time) due to it being impossible (eg not enough tiles) not due to lack of skill.
Maybe there is something I'm missing? I'm aware I'm not good at this game but I'd rather end a run because I suck not because a level was unachievable.
I also think it would be great if your personal best was displayed on the main screen.