Wow that ending was unexpected!!
Really nailed the NES aesthetic and difficulty, but it was quite frustrating! Even more frustrating was that I beat it just by holding right and spamming jump, after many attempts trying to memorize the patterns! Turns out it was so easy!
I think having a bit more view ahead or slightly slower speed could have helped player have more strategy and skill to win. I often didn't have enough time to react or see if I needed to make a big jump or small jump until it was too late.
Here's my playthrough: