I think there should be a bank system. It would allow you to place unwanted to see cards when you recreate your decks. It should have 6 safes (like six decks over levels). Each safe can hold unlimited cards but there are six safes for more comfortable reasons. Just a suggestion because it's really annoying to use filters and see all cards while editing the deck.
Oh and this game has also got it's own wikia http://warmetal.wikia.com/wiki/War_Metal_Wiki and a fansite http://tyrant.40in.net/ I think that means that this game has very good reputation and I totally respect this awesome game.
i fell out of the map... no slender.. no pages counting... no running... you can see the sky in trees... i don't recognize the map... no picking up pages button...
 "Mario Trip"){kind=icon}
 "Tyrant"){kind=icon}
 "Slender - Web Edition"){kind=icon}
 "5 DAYS"){kind=icon}
 "Ask Bin Laden"){kind=icon}
 "Ragdoll Avalanche 2"){kind=icon}
 "Fade and Dain(Beta)"){kind=icon}
 "Linejump"){kind=icon}
 "Escape From The Evil Place"){kind=icon}
 "Doodle God"){kind=icon}
its cool