Hi there,
You might know FreeTumble, a colourful puzzle game that was published on SourceForge in 2009: https://sourceforge.net/projects/freetumble
Edit: tl;dr: There is now a version 1.1 that builds on modern systems and contains only libre assets!
I did not write it, but I had fond memories of playing it a few years ago, and wanted to package it for my distro. Problem is, it was developed for SFML 1.5 (might compile with 1.6 too), but the 1.x branch of SFML is now getting pretty obsolete and is not available anymore in distro repositories. So I imported the V1.0 release of FreeTumble to GitHub and started working on a port to SFML 2.x (2.2 in my case, but I'll try 2.3.x asap).
GitHub repo: https://github.com/akien-mga/freetumble
I'm not really familiar with SFML's API so I went with trial and error, but I managed to get something that compiles. Then I worked on removing the regressions that I introduced, and the current master branch should work as well as the original V1.0 release did, but you should also be able to compile it on a modern system easily
My plans for the future is to make it more packaging friendly (config and score in XDG_CONFIG_HOME, system-wide installation), but also to sort out the licensing issues of the current assets: https://github.com/akien-mga/freetumble/issues/1
The music is CC BY-NC-SA, which I don't like, the font is freeware, and the sound effects are royalty free, so probably freeware too. As for the graphics, they are allegedly drawn by Suiland, but there is no mention of a license; one can suppose it's GPLv3+ as the source code, but it needs to be clarified. I've just written an email to the original author, let's see what it yields.