please give hard and insane keys for creadits

Even better idea how about removing the damn keys all together, why? well because its the "campaign" which is the non multiplayer aspect of the game and with literally almost every other game out there the campaigns can be completed without having a pay to play gimmick like these keys. When you beat all normal levels you should unlock the ability to play the hard levels then when you beat all the hard levels you can play the insane levels. The cash shop is one thing but forcing players to use tokens just to play the campaign is pretty pathetic. But yeah I agree with you if the devs want to keep the key gimmick then they need to give players ways to earn them in game, for example beating god mode yields a hard or insane key. Now for me killing God Mode is easy but for others it can be very challenging and I think being rewarded 1000 coins makes the endeavor of destroying god mode seem pointless aside form the achievement.

I agree with removing the keys.

Also, about "GOD MODE" your not getting enought "sm" after the battle, as fighter2222 mention. Serious, only 1000 sm. Not enough. At-least give 5000 or maybe even 10,000 sm each time you win. I mean seriously. God mode only comes around once in a while.