Buy new characters, word length and money per character; type all words from wordlist; rinse and repeat with prestige upgrades and different wordlists.

I usually don't like 'simple' games with few upgrades, but less is better with this one as the game keeps its 'typing practice' focus. If you are looking for pure incremental fun, I would play one prestige maximum as it gets repetitive fast. But if you are looking for some typing practice, then this game is for you.

Though the absence of some full sentence mode prevents me for going with 5 stars.