I was very glad to see that you added unique new ammo to the catapult instead of just increasing the amount to 3 after every few rounds. It made the game much more enjoyable than the first one!
Quick addendum: There also needs to be something else to do with credits. You can buy all the most expensive stuff by level 50 pretty easily. I'm on level 80-something right now and have over a billion credits that can't be used for anything.
I like that the game is sort of like War mixed with Uno. I'd love to see some unlockables or bonus cards added though--it's very repetitive at the moment.
Original game is pretty easy, but Queen Mode is insanely hard. There's no curve, you just go from dominating to being dominated. As far as I can tell, you can't level in Queen Mode either, so you're stuck being weak the entire time.
Excellent game. I really like that the exit point was random each time so you couldn't cheat your way to victory by knowing where to go after your kill.