I just finished it, and I gotta say, the promotional materials and main menu don't make it justice. =)

It's an arcade platformer about a boy equipped only with a bow climbing a 26-levels long dungeon for reasons.

Gameplay is pretty fluid and refined, and although some design choices seem odd at first, looking almost like bugs/exploits, considering right in the beginning, a "NPC" indirectly incentivizes cheesing the game, now those designs seem deliberate.

I'm not an achievement hunter so I don't think I'll be going for the Golden Levels, which appear to be just harder versions of the normal levels.

I certainly recommend it!