Haiku Studios was developing Down in the Dumps for CD-ROM and CD-i. For CD-i, the use of the extra memory in the Digital Video Cartridge was needed to get all the animations going. The footage we have seen was very low in framerate and that might be the reason Haiku decided not to continue with it. Maybe the game was too ambitious to release on CD-i. It was meant to be a "Digital Video on CD-i" title. It seems like CD-i had quite a few ambitious projects that in the end were a bit too ambitious for CD-i to handle. The CD-i version needs more optimization time and developers do not always have this time. When other platform versions are ready they can decide to go for it, leaving out the problematic version in order to start the cash flow.
Down in the Dumps is an interesting one which was actually the theme of CD-i at an ECTS (A European Based Video Game Show, the European Computer Trade Show)) event with the booth covered in trash. Philips only does this when they have confidence that the game will actually be released. More on that soon :)
Haiku Studios was a French video game developer founded by Olivier Cordoleani and Hervé Lange in 1993. Their first game as Haiku Studios was actually Down in the Dumps. They also developed 'Demon Driver', which was also bound for CD-i, but unfortunately, as well as this game, remains unreleased. The company went out of business in 1997.