I had some real issues with the physics engine. I'm not super surprised that you got stuck in a wall. Sorry for that.
In my mind, the difficulty of avoiding cards is a bug, not a feature. I like the idea of something that is very good or very bad depending on context (i.e., if you have a good hand, all the cards become essentially landmines). However, based on your comment, and some of the others, I may be alone in that assessment.
And thank you for your enthusiasm! I'm really proud of the (somewhat secret) ending. I'm really happy you like it too.