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Now test your game. You should find that the you can now restart the game when the game is over. And your lasers should be limited to four lasers on the stage at any one time. CONGRATULATIONS you've completed the tutorial and now have built your own arcade game in Flash 5. The next step provides some suggestions how you can improve and extend your game.
Extending and improving the game These have been three quite long tutorials, but having completed them you should now have a good sense of how arcade/action style games can be built with flash 5. While we have built a simple space flying game, many of the core elements of the game could be used in a variety of action games. Almost all action games involve player movement, enemy movement, collision detection and scoring, which were all implemented in this game.
To keep the tutorial from being too long, the game was kept as simple as possible. However there are quite a few improvements that could be made to the game. 1. Make the game harder by increasing the speed of the enemies or the number of enemies or limiting the laser fire. 2. If you noticed the game performing slowly or if movement was a little jerky, this would be because the graphics and stage in the game are quite large. Try reducing the size of the stage and game graphics. A smaller version of the game is available in the downloadable zip file. 3. Try using bitmap graphics (eg: png format images) for the backgrounds. Flash is designed to work with vector graphics, but you can make fast and effective games using bitmap graphics provided you keep them small. 4. At the moment the player can move off the top, bottom and left of the stage which is a bit unusual. You can prevent this by including an extra test within you if statements for the player movement. eg: if (Key.isDown(Key.LEFT)) would become if (Key.isDown(Key.LEFT) and this._x>0) 5. Add in player lives so instead of the game ending when the player collides with an enemy, the player just loses a life. You will need to add in a lives variable and reduce this by one when the collision occurs. When lives is equal to zero the game will be over. 6. The game could do with some sound. For example: add an extra layer to the enemy movie clip. Put a blank keyframe on frame two of this layer and put an explosion sound at this frame. 7. The lasers currently keep on travelling even when they hit an enemy. You could change this by using the same code that is used to remove a laser when it goes off the stage to remove the laser when it hits an enemy.
Some further enhancements. Here are some ideas for how you could really change and enhance the game. 1. Add in something to collect such as a bonus or people to be rescued (like in the old game Defender). 2. Change the movement and scrolling so that the background scrolls down the stage and the player moves up the stage. This could then be the basis for a space shooting game like the old games Galaga or Galaxian. If you change the background to look like a road you could have the basis for a top view driving game like the old game Spy Hunter.
Anyway, I hope you have you found these tutorials useful and I wish you lots of success with your flash games. Regards David Doull
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Building Games in Flash 5 - Part 3 - Enemies and collisions
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