Earning Money by playing:

Snow wars 2 (3000np) 220 points less than 1 minute [link]
Stockmarket 1000 units per day (try on those that are 15np per unit and sell when u get to earn 3000np - 5000np if u want to play safe) [link]
Featured Game (if you're good at it)[link]
Bumble Beams 650 points (3000np) [link]
Petpet Cannonball 375 points (3000np) [link]
Whack-a-ghost 250 points (3000np)
[link]