An okay medal grind game (for that 300K). Took me 50 full pages in-game to complete. And that is just a fraction of the overall levels so anyone with enough time (probably 5 or so hours) can complete this.
Aside from the arrow issues, the game repeats words from time to time (but do accept the same solution). They can also be a extension of an earlier word so one word is completely inside of another. Btw, to solve the arrow and page issues, click a page back and then forward.
For the 900 medal, refresh until you get a round with 7, 8 or perhaps 9 words. From there is almost purely luck. Some categories might have higher/lower chances for fewer words?