Black Rainbow
A pleasant little point-and-click adventure with many mini-game puzzles. Note that it is not a hidden-object game (no hidden-object scenes).
Nothing about it is amazing: the story is OK, the voice acting is OK, and the music is OK. Slightly annoying is that the graphics are all at a very low resolution, but they still do the job.
Note that there are in-game achievements but they are not linked to Steam.