Back in the days when the standard for H-games was way waaaay lower,
people made tons of little flash games and animations.
I used to collect these before I got into proper H-games.

Here's a set of five interactive tiny flash files,
none of them even as big as 90 KB.

Of course I didn't make these but all of them used to be available for free.
If you're interested, you can download them here: Zippyshare Link
(Beware of unwanted popups when downloading from Zippyshare)
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File name: Vibro_uncensored.swf
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This is a very simple but effective one.
You can make her feel good by clicking
her directly or turning up the vibrator.
It's all about the simple things in life.
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File name: densya.swf
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A little game about one problem that only
seems to be prominent within Japan.
Your goal is to grope her on the train.
The art is surprisingly good for a 82 KB file.
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File name: trtrdtd.swf
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This one is very straightforward.
If you can read Japanese, the instructions are right there on screen.
I'm sure you can guess what you can do without reading that though.
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File name: undress.swf
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With a filesize of only 59 KB, this looks like a fairly predictable
undressing flash, which are among the most common themes
for super-small games like this one.
If you click around for long enough, I promise you'll be
surprised what can happen within this small game though.
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File Name: hakata.swf
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Calling this interactive is a little stretch.
You can use the buttons to customize her,
manipulating breast size and adding a toy on her.
It's almost closer to an animation loop but not quite there yet.

❥ Have fun and enjoy.

[Flash Games] 5 Tiny Hentai Flash Games - A blast from the past