Prismaticka is a SpaceChem-inspired spatial programming game about color mixing. Place commands on the board to guide a colored cursor around, which mixes with colors on the game board as it passes over. Specific colors have to be made and brought to a queue (Q) token on the board in a specific order. The cursor also has a second color in memory, which can be swapped with the active color at any time. Puzzles range from simple to exceedingly complex, where color mixing exercises give way to problems of branching paths and careful memory management.
Available on PC, Mac, and Linux. Made with Unity. I've since lost the source to this game, so all that exists is an incomplete version. There are some bugs (levels will sometimes forget to load). There is also no sound.