that interactive story I still care about

All your valiant efforts are foiled by gravity, and you fall, clutching your -Portal Placer-, and the only thing you can think to do is mash the green button on its side.

The gun vibrates for a second, and directly below you, a spark of light and a warp-sound are all you can process before you hit the black portal you made.
There is a loud vacuum sound and a spinning feeling...

Once you hit it there is a loud vacuum sound and a spinning feeling...

Then there is only cramped space, and a numbing coldness.

And your -Snack Pack Pudding-.