Iron Man Go Go Go
Controls are pretty basic the way they should be in a action-packed games. Arrows keys are for moving left, right and jump, and that is all you need to worry about. Hulk will be fighting with aircrafts, so there's a separate bars for Hulk's power and the aircraft damage. To destroy all the aircrafts in the area you should press key 'Z' - that's "Rage special" or as you can see on image below "smash attack", but it's available only occasionally. There's also a jump bar, which when gets fulled allows you to jump which is normally not possible. The only downside of the game is that I don't see how can Hulk die easily.
How to upgrade IronMan's armor suite
If you collect coins and power ups you will be able to do some upgrades on Iron Man suite. First of all you may increase the capacity of the energy storage and set higher level of initial energy. It is also possible to improve energy cannon, make it stronger with wider range. It is also very important not to forget Iron Man shield. The better shield he has the more damage he can take. You are allowed to enter shop and do the upgrade after each round. Don't go shopping unless you've got enough money.
I use up arrow key (left arrow key is an alternative to it) to lift the Iron Man into air. Space bar button will release energy beam which destroys flying objects ahead. The idea is to destroy as many objects and to pick up as many coins they leave behind as you can. Make sure to note that stone objects on the ground cannot be destroyed, so avoiding them is your best bet.