Ok, I took some time off from staring at the card and then something comes to me. I'm much more pleased with this version. The butterflies are still on the window sheet and it allows you to see the tulips and the clouds underneath it. When you open the card you just see the flowers and the clouds.
I even managed to "save" the first card instead of remaking it by "erasing" some of the butterflies from the top of the sheet using rubbing alcohol (I used staz-on ink) and then chipping the lumiere off of the back.
So here's try no. 2!
Edited to add link to gallery: (same card just in gallery now