67 is indeed a good score, but your 52 when always playing the middle card shows that there are several ways to approach the game. You're right, clicking on the highest card gives you a short-term advantage, but it's not always the best strategy when you consider the overall score. It's precisely this delicate balance that makes the game interesting.
I manage to score around 76 with a fairly basic strategy. I'll ask my colleague how he scores: from memory, he has developed a more long-term strategy that often yields a higher score.
But you're right, we still need to work on other types of cards and features.
I'm really glad you like the atmosphere, colors, and music!
And thanks for your feedback on the graphics too. naoh8 really wanted to create something lighthearted and whimsical.