I'm really confused that everybody calls the controls clunky. I think the difficulty of the slippery ascension is the point of the game. Compared to every other NES game the physics and the responsive enemy behaviour are amazing. I was hooked to my Switch until I climbed all 32 mountains. The necessary perfect timing for some moves really reminded me of today's hard core jump'n run games like Celeste. It would be very interesting to see Nintendo coming back with this I.P.