Professor Wallace - Puzzle

I think it looks beautiful with a decent format and layout, but it seems like they ran out of puzzle ideas before #20. They force patterns onto things without having a definite beginning to the puzzle. 1,3,4,15,64 was one I remember, like where did the 3 come from? It doesn't fit the rest of the pattern. Or puzzles where you only look at specific pieces of the data because the entire set of numbers doesn't all fit together. There are way better puzzles apps out there. I did enjoy the music though. Just noticed the developer's question as to why #22 could be answered L rather than the "correct" answer of T. Well where does the puzzle begin? I started at B and worked around clockwise. Following the logic of only comparing to the letter across the circle, you have no context of which way to go or if any other letters are related (they don't appear to be but it was late lol). So when you get to the ?, L is 4 letters before P. But if you start at P, you get T because p is 4 letters before t. So it seems like either answer could be correct, but I feel like puzzles like this should only have one correct answer.

Calm mathematical puzzles. I don't like the graphics flickering from dark to light. I have earned a few Google play achievements but I haven't been given them. All achievements are ultra rare with fewer than 0.1% of players earning them including the first puzzle 1 + 1 =. Therefore it is obvious that no one has been given their achievements.

At times this game won't accept logically correct (i.e., fits patterns/puzzles as presented) answers because they aren't the game developers preferred answer. Causes a lot of frustration trying to guess which correct answer the developers require.