There's more depth to this than meets the eye at first for sure. Some explanation would have been really good. Seems like an inventory managment battler? After a while there are too many cards to take down. It would also have been nice to be able to restore health.
I liked the card that required two equal cards rather than specific numbers. Somehow that was intuitive without any instruction.
My score was 1302 but apparently leaving that page open means it's going up, so it's now 1307. Maybe it's those last cards spitting out some points. Nice work anyway