Necessity of trial-and-error detracts from fun.
This game was pretty fun. The animation was excellent, and many of the deaths were quite amusing. However, I found that, as the game progressed, actions became less and less logical and the player needed to resort to trial-and-error - which became long since you needed to reposition EVERYTHING each time. (Death sequences made up for that in part.) If it wasn't for that, the game wasn't very challenging at all - it would be cute, fun for that reason, but not engaging the player's mind or skill.
Also, for the intro and ending sequences, the English was often unnatural or redundant (e.g. "reunite again" - the "re-" implies the same repetition of an action as "again" does). Perhaps you should check over your English, or have a native speaker look over it?