Alright after a long period of nothing happening on Zedd, i am releasing the unoptimized and messy source. Feel free to mess with it and play around with it.
Also, i am going to now do a detailed explanation of how Zedd does its physics calculations. Each object has multiple variables, 256x precision location, and regular velocity variables. In the physics portion, Zedd loops through each object. For each object, the object is moved along its Y axis in the distance of its Y velocity. It then checks for any collisions with any objects, and if there is a collision, the movement is reversed, then the transfer of forces takes place. All forces acting on the current object in the Y direction are transfered to the colliding object(s) and all colliding objects transfer any forces they are experiencing in the Y direction onto the current object. The velocities are recalculated with momentum and energy equations, also taking into account a 'stickiness' threshold, where if the objects are moving at a slow enough velocity, they will both just stick to each other. There is also friction calculated in the X direction, perpendicular to the plane of movement. And there is also tipping calculated, if an object rests on the edge of another object, it will 'tip', as in a force is applied to the object to make it slip off the edge. This entire process is then repeated for the X direction. After handling the floors and sides in a similar manner, the process is now complete, and the loop moves onto the next object.
The most magnificent thing about Zedd is the transfer of forces, objects collide with other objects and transfer their forces onto others, so if you put a block on top of another, it pushes that block down, and the more blocks you stack, the more force there is.
As for how the individual scenarios work, here is an example behind the physics of the specific things:
1st screenshot: Is pure Zedd, the only thing added is forces attached to the keypresses.
2nd screenshot: Springs. The way springs work, is that there is a force applied to each box, and it is a direct relation to the distance between them. So if the X distance is 500, the force is 5, if the distance is 100, the force is 1 lets say. Since forces are independent of Axis, you do that for both objects, in both axis, and you are golden
A fancy spring animation seals the deal.
3rd screenshot: Water buoyancy. The physics that makes this screenshot cool are more Zedd than the custom water physics, its really not that complicated. When a box is fully submerged, there is a constant force of say 500 upward. The complicated part is where the border is. Basically you take a percentage of how submerged each object is, and you take the same percentage of the force. 50% submerged is 50% of 500. 20%, take 20% of 500. Not submerged at all, there is no force
Zedd takes care of the rest. So that you get these fun stacking effects with he transfer of forces.
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) overall, its becoming an excellent and amazing resource! Well done!
Is your fan working? Thats the extent of my hardware advice! 
I hope you can fix it!
Oh if only there was a lobster character...
Its complex, but it still takes up less code than the boxes o.O Physics really takes its toll on size. Right now boxes are the largest amount of code, followed by Plasma balls, followed by buttons. The plasma balls aren't completely finished, there is still some code to get it to work for every general case, and to add functionality for creating them into my level editor. But for now you can enjoy the lovely screenshot i have put together 