Things wrong with this movie....
Firstly, if you're going to go to the trouble of doing a movie at all, then at least make the sound half decent. There is little as distracting as poor sound in a movie. I know this is a low budget movie and I'm not expecting THX quality, justa consistent sound level and decent clarity.
If you can't afford good CGI, LEAVE IT OUT! Do not put in graphics that look like they were done on a ZX Spectrum. Find another way to do it. The thing that attacks them in the corridor (which I think is supposed to be a skinned person) is laughable. It's limbs don't even connect to each other. Seruiously, a guy in a rubber mask would have had more impact.
***SPOILERS***
Plot gripes.
If everything created disappears at the end of the day (until the killer changes that), what were they suppposed to eat? There apepars to be a single common room and it just has a table. If the assumption is that they create food themselves then it would disappear from their intestines before it was properly digested (well they might manage to hang on to breakfast but that's it).
Changing matter from one form to another requires an insane amount of energy (look into how nuclear weapons work). A more believable scenario would have had them linked together and plugged into the house, so that eveything they experienced was only happening in their heads.
If the computers that Charlotte creates are only telling her things that she already knows (and nothing else would make sense), then there's no possible way they could have given the killer the information he would have needed to completely reprogram the systems in the house.
The one and only redeeming aspect of this movie was the character of Della. It's an interesting notion that the killer would create her the way he remembered her rather than how he wanted her to be and that that would cause her to become a liability to him.
Over all, this film wasn't worht the money I paid to watch it or the time I spent watching it. I can only assume that the one review that's posted for this movie was written by the director. Sam Raimi made Evil Dead on a shoestring budget. It is impressive to see just what can be achieved with that level of finance by somebody who has some real talent and skill. While some of the effects in ED may seem a little crude by modern standards, they weren't half bad in their day and Raimi mangaed to create atmosphere with lighting and camerawork. Comparing this directors work to the early work of Raimi really just makes him look like an ant beside a giant.