My very favorite PS1 game.
I didn't have lot of opportunities to buy games, being not just from a below average wealth family, but also from living far away from the closest game store. Also what I got to play was moderated by mom, so couldn't get anything too crazy (^^')
Fortunately this was a Disney game so she couldn't say anything while I was jumping around Magica's manor. That music haunts my memories still and I love it.
The only other game that could compete would be Spyro Year of the Dragon, but while I recall only some of the levels of that game, this game reminds me of those days of sitting in front of the TV on saturday, eating candy and trying to get past the Frankenduck's and dodging Merlock's fire-spell patterns, till it was time to go to the market with granny.