Abysmal controls scheme: When you want to jump up, you stand on a block that says "Up" instead of using one of the main buttons.
Also, speaking of the controls, they are pretty stiff.
The entire gameplay is practically the same as the other three previous games with barely any changes to it whatsoever aside from the graphics in general.
As with the previous Crazy Castle games, it only takes one hit to kill you instantly.
In order to get continues, you are required to put in a password (which might make sense as some games before this required you to have passwords in order to do anything, which could have been excusable if it was done right, but only fails so badly.)
The graphics and colors are over-saturated in this game as opposed to other Game Boy Color games that have much better colors than this one.
The background music is obnoxiously loud, making it a nuisance to your ears.
The game can be completed in less than five hours.
The Only Redeeming Quality
While still pretty bad, the game is an improvement over the previous three Crazy Castle games with the exception of Crazy Castle 2, as it is also a major improvement over the first Crazy Castle game.