Engineer is a free application from the upcoming book "Practical webOS Projects with the Palm Pre". It is a game where you play the part of engineer of the starship Prenterprise (hehe). Your job is to direct particles created by the generator in the center of the screen into the correct injector port at the corners based on color. You do this by tapping the particle diverters around the generator, or by pressing the keys W, A, S and Z which correspond to the top, left, right and bottom diverters respectively, to cycle through the diverter states. Choose the right one to complete the circuit and thereby keeping a particle moving. If a particle goes into the wrong port, or back into the generator, or hits a diverter with an incorrect state and cannot continue, you lose points. Also, when they go back into the generator, or the wrong port, the engine heats up a little. The bar below the play area fills up as the engine gets hotter. Tap the game area somewhere other than the diverters, or press P, or physically shake your Pre, to cool the engine down a bit. The game ends if the engine overheats. It's a very challenging game that will take a great deal of concentration, planning ahead and quick reactions to avoid disaster!

Engineer screenshots: