C.A.R.D - Find the Secret

Find the clues placed for you. They'll help you obtain the code.

UPDATE:

couple more codes!

UPDATE (Again):

3 more codes! Here's a freebie one! 638

It's also on GameJolt now!: C.A.R.D - Find the Secret by A weird account - Play Online - Game Jolt

(I'll add more codes later)