Too many pop up ads – Tangram Block Puzzles Review

I enjoy the challenge from this puzzle, and have purchased upgrade to remove pop up ads, but the ads are still on the app. In fact, there are so many ads, the game is unplayable. I would have rated this app much higher, but the ads are so annoying, I have taken the app off my iPad. I have contacted the developer several times about this issue, but they do not respond.
Review by jnb1258 on Tangram Block Puzzles.