Hello,
Nice entry.
And it your first jam, congratulation!
The game idea is interesting, because of the good use of the theme and the limitation.
I have to admit I was a bit confused about wich colors I had to create to beat the levels, after randomly succeded in two levels, I then understood that it was the background color to copy. ;-)
Anyway you did a good job it was simple but fun to play.
Have a nice day.