Yeah, right-click on the event and 'toggle disabled'.
If you store the values in a dictionary you could do something like:
<img src="https://dl.dropbox.com/u/8367729/construct/pics/dictionary.png" border="0" />
This thread might give you some ideas. Have a look at R0j0hounds capx:
http://www.scirra.com/forum/how-to-make-bullet-follow-the-line-just-drew_topic53718.html
Have a look at the examples here using the canvas plugin:
http://www.scirra.com/forum/make-a-scratch-card-help-please_topic53043.html
apple: on collision with bubble
apple: pin to bubble
should work with multiple apples/bubbles.
You can check if the lens object is overlapping an object and then object.PickedCount will tell you how many it's overlapping.
moonStarMeteorOverlapping.capx (r99)
You're setting the player mirrored every tick in event 4. That's why he's always facing left. You can get rid of event 3 and 4.
Relevant thread: http://www.scirra.com/forum/colision-question_topic54475.html
Another option is to pin the rocks to the ship instead of to the walls.
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angle(knight.x, knight.y, mouse.x, mouse.y)
The angle is between 0 and 180 when the mouse is below the knight. And between 0 and -180 when the mouse is above. If the mouse is directly above the knight, the angle will be -90.
Here's an example: repeat.capx
Yeah if it's a top level event it will run every tick.
That 'repeat 10 times' repeats 10 times every tick. You need to make it a subevent of 'on start of layout' or something similar.
You could use project files and AJAX. This tutorial has a bit about making a level editor:
http://www.scirra.com/tutorials/328/using-project-files-in-construct-2/page-1
You can use the 'Array: Download' action. That will give you a link to the JSON which you can then save as a text file or whatever.