A lot of text to read. I feel that this type of player training is disrespectful to the player.
There is always an organic way to train the player.
Smaller levels with fewer elements at first.
A game like this could easily be taught without a single word. And the player would enjoy it massively more for not having to read so much.
The best and smartest players hate reading the most. Because it doesn't allow them to use their brains and figure things out for themselves. In general, reading allows the brain to shut off, like watching a movie, and not have to think for itself or solve any problems.
Also... oh these good old days when flash authors didn't even allow movement to be WASD