This is a guide to make you rich! But you must averaging good score returns at TONS of the games! This method is also a little time intensive. Without further ado, Here is the guide!
First play Ultimate Bullseye! This is EASY! Score 35 or higher and then send your score! If you get 34 and below, RESTART THE GAME! After you play you should have nearly 800 nps!
Now play Volcano Run. This is a bit tricky! You need to score 1200 each round! So this may-be one tricky one for some people! After you play, you should have nearly 2000 nps!
Then play Usuki Frenzy! This is probobly the simplist one! Score 195 each round! You should get about 290nps each round! After you play you should have nearly 2870 nps!