A Bit Glitchy
There were a few instances where simply odd things happened... First of all, the nuke feature occasionally misses one person which basically forces you to wait for them to die or for time to run out. Occasionally climbing worked badly when approaching the back of a built bridge -- the climber would sometimes keep on climbing right off the top of the screen.
The play is obviously quite similar to Lemmings, but one inconsistancy with the original is that it's impossible to "free" blockers by undermining the platform they are standing on. They just keep standing there on thin air trying to block people. Also although 15 levels is by no means a short game, it isn't nearly as long as any Lemmings game I've ever played.
Usually though everything runs smoothly, and the gameplay follows the classic solid play of Lemmings quite well. So overall this is still a good game, even if it has occasional problems and isn't particularly original.