This is a strange case of more comedic content covering up for the fact the plot is very thin and the events pretty unimportant in how they engage the viewer. The film at no point makes it interesting to know how what's going to happen will go down, and the viewer is rather pleasantly distracted by the on screen humorous embellishment of the various successive scenes rather than what they actually depict for the story.
As more specific criticism, Martin is slightly out of place: his NY accent is passable if we're being nice and surely another good comedian of the time could've played that role. Moranis on the other hand, seemed perfect for such a role and did indeed play just right all the time. Cusack does very well in her nerdy old girl role and certainly adds to the experience on her own.
A special mention to the character Kirby (actor Bill Irwin) with his hilarious and spontaneous dance moves.
As more specific criticism, Martin is slightly out of place: his NY accent is passable if we're being nice and surely another good comedian of the time could've played that role. Moranis on the other hand, seemed perfect for such a role and did indeed play just right all the time. Cusack does very well in her nerdy old girl role and certainly adds to the experience on her own.
A special mention to the character Kirby (actor Bill Irwin) with his hilarious and spontaneous dance moves.