That's probably because we weren't able to write down a better description. We are really sorry for the confusion. We will come up with a better description and include a tutorial in the following releases.
We didn't have the time to include a tutorial this week but we decided to alter the score system to make the gameplay more rewarding. You get 5 points when you complete a "green - yellow - red" sequence and get 10 more when you complete the second part of the sequence which is "red - yellow - green". It may not be the final decision on the scoring system but we think it's more reasonable.
We'd love it if you play the latest version and share your opinion with us.