I had about 6 hours only for level development :p
You'd be surprised at the amount of depth I did go to for certain combinations, but I'd imagine there's some I missed :')
I think I made level two's solution a little TOO simple, actually. Got caught up in adding easter egg text and forgot to signpost the answer sufficiently.
If you want to email me any suggestions to emperor.kun[AT]gmail.com that would be appreciated. I'm still keeping the idea of fleshing out the game in mind.