The few moments you don't spend pounding them to a pulp are when you control Bruce in a stealthy, sub-Metal Gear mode, that is just too dull to work. You start off being attacked by the army in the middle of the desert, then as Bruce Banner you break into a research lab, see another scientist get hulked up with gamma rays and then spend the rest of the game chasing him and swatting soldiers left, right and centre.
The Hulk has never been about brains, but even for a smash 'em up game, what passes as a plot is almost insulting.