This is a super cool idea! You really have to consciously focus on what you're doing and hope you get something helpful. However, this poses an issue in the later levels, where your hand will just get bloated by unhelpful cards. Like, stop giving me shoots, I just want to walk right! Maybe this could be alleviated a bit by increasing the hand size when more card types are introduced? I'm not sure what the best solution to this would be. Also, it seemed like the spike hitboxes were too big because I kept dying while very clearly not touching them.
But really, this is a super sick concept that I think would really shine after some refinement. Keep up the great work! =)