Definitely a cool concept overall, card-based/turn-based sidescroller tactics. Someone mentioned worms and I agree there is some of that DNA here. Some brief kinda tutorial would definitely help this one a lot but understandable there wasn't much time in the jam. Took a bit of experimenting to figure out how to activate cards and how to charge up rockets/etc. Some more visual feedback on attacks overall would help too, particularly with rocket explosions / etc to understand how big the blast radius is.
Solid start, this could definitely be fleshed out for a more refined experience.