It works on modern systems, though may require some tweaking to get it work (thankfully the stickies explain how).
Honestly the demo covers some of the more boring levels in the game (especially level 3, level 1 gets you into the game but its so short and easy). Later on it gets MUCH better, but the last level you may find frustrating, due to the lack of a mid level save. In any case, it should be very cheap, so go for it.
