Artwork is fully supported in 0.87b and 0.88u4b1.
However in the specific case of Armor Attack, proms were added between those two builds, so you need the new zip to play in 0.88u4b1.
And, it looks like the screen rotation is broken in 0.88u4b1, it appears upside down and none of the flip/rotate options will fix it. But it works fine in 0.87b (with either zip.)