Lacking compared to other nonogram games. Only three lives, no zoom feature, penalizes for placing x markers incorrectly (which I use to plan out moves), doesn't have a counter that shows how many tiles you place when dragging, etc. And, of course, the incredibly intrusive and excessive ads. Ads before and after each level, all of them are long and difficult to close out of, and often the ads play longer than the level lasts.