The NP ratio tells you how many Neopoints you'll earn for every point you score while playing a game.
For example, if the NP ratio is 100 NP for every 150 game points scored, to earn the maximum 1,000 NP reward for playing, you'd have to score 1,500 points during the game.
On the other hand, if a game's NP ratio is 25 NP for every point scored, you'd only have to earn 40 points in the game to get the full 1,000 NP for playing.
Spellseeker:
Life as a wizard's apprentice can be tough. Not only do you have to study your spells for hours on end, you also have to make sure you get them right... or else all of the spellbooks in the library could be consumed by a curse! Make words using the letter tiles or create sequences of matching numbers and symbols to work your magic. Be careful, though -- if one of the cursed tiles reaches the bottom of the screen, your game will be jinxed!