Didn’t play this for that long today, although I did manage to get as far as World 6-3. It’s still not getting very difficult, but it’s slowly getting more complicated, if you see what I mean. The puzzles (and most levels have at least one) are getting more involved, and I’ve had to solve a couple with trial-and-error simply because I can’t understand what it is I’m supposed to be doing.
I was under the impression (although I don’t know where I got this idea from) that there are six worlds. Well, World Six is too happy and bouncy to be the last level. One of the Rules of Platform Games is that the final level/world/area is a castle, an enemy base, or set in space. Or a combination of them all – not some sort of garden with smiling flowers. Or something.