Oh, you need to line up ornaments with the opposite color. Sorry, I should've made that more clear somehow. I just updated the store page to mention it.
It's hard to say, given how many times I tweaked the balancing in development I lost track of my official high score. I want to say it was around 100 or so, but I'm not sure. Personally the scoring for me breaks down like this:
- 0-49 = bad
- 50-60 = okay
- 61-70 = good
- 71-80 = excellent
- 81+ = pretty sure you need really good RNG to do this consistently
Although personally I'd just focus on trying to get a better score than you did yesterday. That's what I did when I first played.