Seeker

Seeker is a game similar to Black Box and others I've seen before (notably more than once on Shovelware Diggers show). The object is to locate five hidden places on the 8x8 grid by firing energy beams. Based on the results (beam returns back, gets reflected elsewhere, gets absorbed) you can gradually reason out where the hidden places are located. Personally I don't enjoy this kind of game, but since I have seem multiple variations of it, some people must like it. At least this version offers mouse support, in fact it requires it to play.