Sadly the game is easy enough to beat without translation. I did it back in the day without a guide.
The combat feels extremely sluggish, but I do love the running mechanic by double tapping jump. Can't comment on the story for obvious reasons but the first half of the game looks beautiful, but you can tell they start running out of time by the second half of the game and the game's charm suffers for it. The final boss battle sucks.
Honestly it's not a very good game. It lacks depth, it's quite linear, it's very very short and the overall gameplay is very very "meh". I don't think I'd play through it again in English.