Not quite. There's a hidden quest line. Try searching for alternate endings to the levels and talking to the npcs. Alternate endings unlock the 2-x levels which are more story driven than the 1-x levels
This is where diving deeper comes in
ahhh. I'll check it out
I went back to try and find all the alternate endings to the levels. which was really fun. and I captured the mole, so the bad ending I guess.
Cool! Did u enter the override code?