Great Aesthetics, Okay Mechanics
The game looks wonderful, but there are severe issues that prevent it from being a classic.
1. The character moves too slowly, making even the simplest of levels take way longer than neccesary.
2. The character animations, when going into the ground, take just a second too long, which gets frustrating fast.
3. Having the "Suicide" key so close to the controls is a perfect recipe for accidental deaths when one was only hoping to go into the ground. It would be better if it were the "P" key or something.
4. Password systems seem quaint. Saves, auto or otherwise, are the norm now for a good reason.
5. Having to learn by dying is not particularly fun. Having to lose a life to, for instance, figure out that Slappers won't hit you if there's a rock in front of them (something that doesn't make intuitive sense as they are wider than the friggin' rock) feels like I'm being punished for something that wasn't explained to me.
Again, the art was wonderful, but there are some gameplay issues. I would love to play the sequel though.