The absolute number one thing a developer can do for a game like this is to lower the cost. Not only did you do this, but you cut them by 50%! Congrats on being the only CCG dev to actually do this.
While I can see beating 32 levels with every vehicle a hard badge, I feel as though getting every level perfect and speedy should really be an impossible badge.
Just a bit of math. The cheapest cards in the game are 5 gems. Since it costs 10 dollars to purchase 100 gems, that means each gem is about 10 cents. If the cheapest cards are 5 gems, that makes them 50 cents. For most real life TCG/CCG games, card packs are about 3 dollars on average for 9 cards, which means each card in the packs is about 33.3 cents. For a pack of only 5 cards in this game, you are charged 5 dollars (for the promotional pack in the shop), so that's a dollar a card. You might want to change the prices a bit since (as a rough estimate) you are charging three times as much for a piece of data than most card companies are for an actual physical product. Hopefully the developer might see this and change the prices up a bit.
I feel like the items just kind of shot the game to an unnecessary level of difficulty. Took 4 tries on level 7 to beat the family because they had 2 special items when I didn't have one yet.
I really hope to see a next game, but if there is one, you might want to add more things to the game. Mainly different weapons because playing a side scroller with only one weapon is quite frankly pretty boring. And some generic upgrades might help, like armor upgrades or a magnet for coins.
While the game is devilishly hard and enjoyable, that doesn't take away from the fact that the music sounds like nails on a chalk board with the screeching.
Nerdy, while I do enjoy seeing a developer comment on a game, I think having 4 top comments just from you might be a bit of an overkill. I think it might be time for you to get your very own forum for all of your games and updates and what-not.
Good game but the lack luster amount of cards might be a bit of a downfall if you want people to buy more. I know the game will be updated in the future but with only about 75 or so different cards (not counting evolutions or variations of equipment) most cards can be obtained quite quickly buying only the first two packs, besides the rare and epic cards.
Getting some pretty bad jumping bugs, such as randomly stopping in mid air and having to run and jump up onto ledges instead of just jumping up while standing beside them.
Good game but because of the length players really shouldn't have to go back and play through to get all the weapons, because there is no way that they can buy all of them in one sitting with the gold available in the first playthrough.
 "Sands of the Coliseum"){kind=icon}
 "Card Monsters"){kind=icon}
 "Super Adventure Pals"){kind=icon}
 "Hanna in a Choppa 2"){kind=icon}
 "Kingdoms CCG"){kind=icon}
 "Flood Runner 4"){kind=icon}
 "Deadly Neighbors 2"){kind=icon}
 "Resistance Is Useless"){kind=icon}
 "Ninja Painter 2"){kind=icon}
 "Streamline"){kind=icon}
 "Seedling"){kind=icon}
 "Zombotron 2"){kind=icon}
 "Effing Worms 2"){kind=icon}
 "Notebook Wars 3"){kind=icon}
 "My Big Friend"){kind=icon}
 "Zombie at the Gates"){kind=icon}
 "Ragdoll Achievement"){kind=icon}
 "3 Slices 2"){kind=icon}
Thank you for playing :)