Generally good game! I like the idea which use "Time" instead of "Mana" to play cards. 

I like: 

The art style, simple, fun.

Cards, there are so many interesting cards in the game!

Gameplay,  good idea that u loot and sell to buy cards.

Things need change:

Text, they are so small to read!!!

UI, since the art style is white based hand drawing, some information its not easy to see cause they all using the similar color.

Tutorial, I understand that playing cards affects the timeline of both the player and the enemies, and once the timeline reaches 0, the enemy takes an action. However, the exact execution order still feels a bit unclear.

BUG report:

I purchased all cards in the store, but none of them appear in my deck.

Thanks For Playing this game!

The bug is fixed now, now the cards can be added normally in the newer version. And the savings before can be used with the in the new version

I've noticed other problems you mentioned, we are trying to produce a more detailed tutorial through action instead of so much text. And some UI will be changed in few days to let it looks clearer. 

Wish you have fun with the newest version!