I don't want to take this conversation away from Puzzle Challenge, however its a good opportunity to share our interview with Lawrence Schwedler, the Audio Director of Pokémon Puzzle League on Nintendo 64.
To get back on track, based on my time with Pokémon Puzzle Challenge I found the game really lived up to its name. I found it extremely challenging at points, and loved the aesthetic, music, animations, and the connection to Gold & Silver. I hope more people get the opportunity to play it someday!