In a vacuum, Spelunky 2 is perhaps too hard and esoterically designed to be enjoyable. But compared to its predecessor it has every strength fine-tuned and pushed forward with cleverness and finesse. It may rely (fairly heavily) on the previous game's players' muscle memory and conceptual design understandings to not be overwhelmed. I can't speak for players new to the franchise but otherwise, it's perhaps the most perfect video game sequel out there.