Cards move too slow to the battle field / trash. Once nobody has cards and no units are battling, the game should haste to show battle results... no reason to spam Space. Just my 2cp, the game looks nice.
Btw, I wished I had selected replaying the game from level 1. I got stuck at level 26, then chose to warp to boss level and I'm stuck at it. Being able to start from level 1 after boss level would rock.