5 key works, just make sure there is ABSOLUTELY NO AIR PRESSURE (to the point of start anew and hit 5 before doing anything) or things will go flying :p.
laptops have a key(s) that enable the numberpad on the right side of the letters on your keyboard, you can use that as there is no other place to put the controls... :/
7zip updated the 7z format over a year ago, but nonetheless this upload is in .zip for you (or others)
Added unlimited brush size to the build, I really hope the devs use my code lol.
wouter215: Felix is right and legally I should have included the source with the first release (which I have absolutely no problem with :p) and I knew that, but to be honest I just thought I'd waste my upload on something no one wants so I didn't do it at first. Sources have been included with every version since.
The frame by frame thing definitely needs to be added to the official powdertoy
I tried to make a planet with this using black hole and 0 gravity, but apparently black hole has an uneven pull (high pressure on 2 sides, low on other 2 sides)
I like the nograv feature and the others are fun to mess with :D
I pull requested it into the experimental tree last night after porting it to the latest experimental source revision, hopefully the features make it through . I plan on doing another development run like this build when I get home (out of town with my laptop now) after the weekend ends :p.