A downloadable Hydrodynamic puzzler for Windows and Linux

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Flow Problem is a simple but challenging retro puzzle game where you have to try and guide as much water as possible down to the bottom of the screen. Hindering you are obstacles such as rocks, fire rocks and blocks of ice, which each affect the water in different ways, You also have the effects of sand to deal with.

There are 20 increasingly difficult levels to beat (or beat your own high score on), as well as a random level generator.

As of 20th July 2025. I have given the game a real overhaul - music and sound added, some QOL features, and extensive code optimisation to improve the frame rate. (It still uses, out of necessity, some rather "expensive" AGS function calls, but it does so much more efficiently than before.)

I've also added a native Linux build.


Acknowledgements:

Thanks for Ramon and apici for their help testing the Linux build.

Music by CoMiGo.

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If you liked this game, please check out the similarly-themed Snow Problem, available both here on Itch and on Steam.

Updated 1 day ago
StatusReleased
PlatformsWindows, Linux
AuthorCaptainD
GenrePuzzle
TagsRetro

Download

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Click download now to get access to the following files:

Linux.tar.gz 14 MB
Windows.zip 6.8 MB

Development log

Comments

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Fun!

Thanks for playing, my friend! :-)

Cool water physics!  I wish the water would travel a bit faster though.

So do I! Because everything is worked out per pixel and the get / set pixel commands are quite slow, I haven't found a way to optimise it better. May ask someone smarter than me to try :-)