Use (what I like to call) the Chinese Finger Trap Method:
Don't hastily go for the blocks to rack up your score. Doing this will cause the "oranges" to rush you, bounce of the wall, and get faster making it difficult to avoid them.
Keep the oranges close to you (whilst still avoiding them at the same effort), but don't allow them to stray too far, and don't run away from them allowing them to rush after you even faster. This way you can play cat and mouse with them while slowly (but steadily) increasing your score for as long as your dodging abilities last.