I have to say I saw every single pixel of every Keen game and I MUCH preferred the pure side view games over the isometric side view games of Episodes 4-6 and Keen Dreams. Episodes 1-3 had such an amazing, precise pixel design and a great sense of movement. The leaping just FELT right, with a slight pause while you pumped off the balls of your feet.

The later games, although much more detailed, with a larger character, had a weird floaty feeling to the controls that I never quite enjoyed playing as much.

That said, I loved all the games and it was an amazing sense of discovery. I remember the moment the shareware model finally took hold of me and I realized that I wanted the next episodes enough to pay for them.