Wet was ruined by being repetitive and generic, not by its length. If Wet was longer it probably would have been worse. You can't fix a flawed game (or anything, really) by making it longer. Wet needs a rework in general.
I can't think of a "great game ruined by length." Some games can stand to be longer but I legitimately can't think of a game that was so severely harmed by its length that it ruined its potential. Even Vanquish, a game that can be beaten in 3-6 hours (depending on how good you are), was the perfect length; for it is a game focused on skill.
I can't think of a "great game ruined by length." Some games can stand to be longer but I legitimately can't think of a game that was so severely harmed by its length that it ruined its potential. Even Vanquish, a game that can be beaten in 3-6 hours (depending on how good you are), was the perfect length; for it is a game focused on skill.