You may feel like that because it is animated in about 12 FPS (final render is 25 FPS but Klayman moves every second frame) and original was probably in 15 FPS but that may also be different according to region of the world (PAL or NTSC)
Sorry I don't speak Spanish. This project is finished, I fully realised my idea for the Neverhood project and it's time to move on to new stuff. You can watch behind the scenes video of this animation on my channel.