Here's the English translation of the Japanese text you provided:
I am a rubber-headed human

I absolutely want to climb

Someday, I'll definitely climb it

Uoooooo

Orryaaaaaaaa

I'm ready.
How about you?

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This game is a climbing game where a rubber-headed human jumps to reach the goal at the top.
Enjoy the animals and various objects you encounter along the way as you aim for the goal.

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[Controls]
Left: A
Right: D
Pause: ESC
Jump: Space

Rang the New Year's Eve bell for the first time

Surpassing the Developer

Cleared the stage faster than the developer's time

Reached the summit for the first time

Reached the summit 10 times

Reached the summit 50 times

Get impaled by a shrike

Ride a stingray for more than 1 second

Get punched by a mantis shrimp

Interact with a kakapo for more than 1 second

Reach the summit of all stages

Rubber-headed Drummer