I am a fast player, ad every 5 seconds for me (every 2 puzzles) VERY ANNOYING. Deleting withing 10 minutes. They tried to ask me to rate the game after 2 puzzles before they rolled the ads 🤣🤣🤣. I suspect this is why the rating as the game certainly doesn't deserve it. I was expecting something more challenging for my spacial ability. This would be great for young children if it wasn't for the ads. Would even happily buy the game for $3 to $5 rather than gave the ads.