I'm planning to add more cards, some of which doing multiple things (like moving and shooting) which should make it easier to find cards that do what you need. Right now the deck is also rather unbalanced, having 2 left and 2 right cards, while every card only has 1 copy. I didn't really have time to properly tweak it.
My first priority is a proper tutorial and balancing the timer though, as most feedback was about it being confusing and the timer being brutal :)