Nostalgia, sometimes you should just keep this stuff as a nice memory. This was a great game on the PS1 that I loved. It was one of 3 games I got with the PS1, and one of my favourites, blowing my mind away with it's 3d goodness (coming from a Sega Megadrive).
This game, my modern standards, is just plain frustrating. The first couple of levels are fun, but later levels (lv 14 expecially) are so fricken hard with only 2/3 hearts per level and very long checkpoints. Also the game speed stutters from slow to sometimes stupid fast, making jumps and timing difficult.
This is a lazy port, with NOTHING to add on the original, but is not as good as the original. It's also not aged very well. Don't bother with unless you really need to remind yourself of fond memories.