beta-6.0.2: Guide improvement.

Improvements

• Rephrased the guide from: 'You control a light that grows larger the faster you move. Move your cursor or finger across the screen whilst avoiding the triangles and finding the green square to win. Have fun!' to 'You control a light that grows larger the faster you move. Move your cursor or finger across the screen to control the light. Avoid running into triangles; and find the green square to win. Have fun!' Thanks to u/Malice_Incarnate72 for this rephrasing (https://www.reddit.com/r/IndieDev/comments/15g6pdi/is_this_descriptiontutorial_clear_enough/).