I’ve played my way through the rest of the 87 levels over the last few days. It got a whole lot tougher so the second half took way longer than the first. It’s not a long game but was probably about right to not outstay it’s welcome. There was nothing new really, just more of the same so there isn’t much to add to what everyone has already said.
I wouldn’t say there was much consistency with the difficulty. Some of the later levels can be done in no time with others taking me ages to figure out. No matter how tough it got, I always found it less frustrating than Lemmings which would maybe have been the main competition at the time. It’s the fact you can quickly change things and try things out with no real penalties.
I liked the game a lot. Not enough to put it in the classic category but close. There is a slight lack of variety and the puzzles can be hit and miss. I expect the sequels improved on both of these aspects so I’ll certainly be giving them a go at some point.