Bud, let me tell you a little something. If you think people are just going to run around giving you completed games for you to salvage, you are in the wrong biz.
As scidave said, your best bet is to look at tutorials and .caps (Source codes basically). A project I've been working on for a while (And have started over several times) was all started around a single example done by a use on this forum. And if you can't find anything on what you want:
A. Ask questions about what you want (In pieces)
B. Figure it out yourself
C. Give up and try something else.
Besides, as anyone who messed with game making could probably tell you, snatching "specific game mechanics" is actually bad idea, limits creative freedom. And step one, experiment and put some hard thought into what you really want to make. As for graphics and stuff, you don't need stuff specifically made for construct; if you can't find it, make it
This is something I'm working on, as you'll notice, it's not even close to being done. Yet, because I know exactly what does what, I know what's missing and how to add to it.
P.S.: Not giving you the source code for that. But if you
look a bit, you'll find my inspirations.