Well, “some” feedback is there already (it plays a “win” sfx, hides the cursor, and the text changes to “Mona Lisa”). But I know what you mean, the ending was very rushed (the game even let’s you keep moving the pieces after you win)
About the darker pieces, it was already hard enough to convert the art to 2-bits. I tried to mitigate that issue drawing a border around the image… except I drew a black border which didn’t help at all (oops).
I guess I can try to fix these two issues in a post jam version just so I can leave this thing in a more playable state.