*After I made the post below, I realized I'm little late to this thread and too late to help. I misread this as originally posted, December 20 and was impressed at how many replies you had in such a short time.

Late night dyslexia.
Hi Geoff,
I like the cover art. It's bright and catches your eye. The astronaut with the butterfly (or is it a butterfly?) just out of reach, sparks my interest. I actually like the curved font and the design overall, but it was difficult for me to read. I had to read through this thread to find it's called,
SUPPOSE WE.
Not being able to decipher the title would put me off a little.
I would keep the art and alter the font to make it read more clearly. Perhaps just slightly, bolder type, or outlined, maybe shadowed by one of the darker colors in the artwork. I'm not sure. If you can, play with those ideas a bit and see what you come up with.
I like it though. It sticks out and that's what you want, an attention grabber.
Good luck. I look forward to seeing the finished piece.
~Deb