Coloris is an early and nice looking Columns clone, where you must match up colours in a row or column to make the blocks disappear.
Sat within the archives for some years now (1992 to be precise), nothing more has surfaced apart from this preview, where it is playable to a degree – but continues to play when the blocks reach the top of the screen.
Did it ever progress further than this demo, or was this leaked version the final version from the developer?
Do you know anything more about this game?