I just watched the LGR video and I like what I see! I'm glad they didnt change much since I really like the orginal. They added a 4th episode so there are actual new levels to play! Very neat that it comes with a level editor too. Only thing I didn't think was that great was the music they added. I like that they added music but I think this music is a little weak and repetetive. Also as LGR points out, the NES style music doesn't really fit 90s PC games. It needs some Sound Blaster tunes!
I wanted to buy it but its windows only and needs Windows 7 or better : ( My Keening computer which I use for modding/playing Keen and other old DOS games is windows XP and my modern computer is an iMac so it won't work....