Heavy Weapon is a side-scrolling arcade game from Popcap. As with all good arcade games, the concept is simple and the gameplay is easy to pick up but difficult to master. Note: requires Java and Windows. There is no Mac version available.
You control a tank, which moves across the bottom of the screen in response to mouse movements. Planes fly overhead dropping bombs and weapon power-ups. You can destroy the planes by aiming at them with the mouse and clicking the left button. Holding the left mouse button allows rapid fire, which can make gameplay a bit easier. At various times in the game you will collect Nuclear Bomb power-ups, which destroy everything on the screen. These can be launched by clicking the right mouse button. They are rare, so you should save them until you are in serious trouble. The goal of the game is to survive an increasingly varied range of airbourne enemies until a boss appears at the end of the level.
Analysis: The graphics and animation used are well polished and pleasing to the eye. The sound effects are also well suited to the game. In many respects this game is similar to Heli Attack, with the main difference being Heavy Weapon uses mouse control for movement. This is something I thought should be different. When you are confined to shooting only in the direction that the tank is moving, difficult levels become frustrating and the fun aspect of the game slips away. Using the keyboard to move and the mouse to aim would provide the player with more control and the freedom to avoid bombs while aiming at planes on the other side of the screen.
Another aspect of the game that I thought could be better is the length of the levels. It takes a long time to get to the end of the level, and I believe the game would be more exciting, and hold interest longer, if the player could have a more immediate feeling of success. This could possibly be accomplished by providing shorter levels.
Overall, the game serves its purpose as an arcade game with addictive gameplay. The player will likely enjoy an increasing adrenelin rush as the enemies gradually become more aggressive.