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Wrap up

There's something wonderfully tactile about using the accelerometer to affect gravity in a game, because it feels incredibly realistic even though we're not using particularly good graphics.

SpriteKit is of course doing most of the hard work of collision detection, and Core Motion takes away all the complexity of working with accelerometers, so again it's our job to sew the components together to make something bigger than the sum of its parts.

Review what you learned

Anyone can sit through a tutorial, but it takes actual work to remember what was taught. It’s my job to make sure you take as much from these tutorials as possible, so I’ve prepared a short review to help you check your learning.

Click here to review what you learned in project 26.

Challenge

One of the best ways to learn is to write your own code as often as possible, so here are three ways you should try your new knowledge to make sure you fully understand what’s going on:

Rewrite the loadLevel() method so that it's made up of multiple smaller methods. This will make your code easier to read and easier to maintain, or at least it should do if you do a good job!
When the player finally makes it to the finish marker, nothing happens. What should happen? Well, that's down to you now. You could easily design several new levels and have them progress through.
Add a new block type, such as a teleport that moves the player from one teleport point to the other. Add a new letter type in loadLevel(), add another collision type to our enum, then see what you can do.

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Share your success!

One of the most effective motivators of success is sharing your progress with other people – when you tell folks what you're doing and what you've learned, it encourages you to come back for more, which in turn will help you reach your app development goals faster.

So, now that you've done all the hard work it's time to share your success: tell folks that you've completed this project, either by clicking the button below to start composing a tweet, or by writing your own message from scratch. This will definitely encourage you to keep learning, but it will also help other folks discover my work – thank you!