Sky Shadow

Sky Shadow is a 1990 "Defender" clone for the Mac OS, published by Casady & Greene. It was programmed by Patrick Buckland, author of the classic Mac Game Crystal Quest. In 1994 it was licensed from Casady & Greene by MacSoft and re-released for System 7 on CD-ROM.
Reception.
"Sky Shadow" was critically acclaimed when originally released, featuring detailed graphics and fast-paced gameplay. It received the top score of five mice from "MacUser" magazine and was inducted into the "Macworld" magazine "Game Hall of Fame" as the Best Shoot-'em-up game of 1990.
"Macworld" praised "Sky Shadow's" graphics and sound effects as well as its gameplay, stating that ""Sky Shadow" is an engaging, fun, and highly addictive game". "Macworld" criticized its stability, stating it "often crashes", as well as its "severe penalties for minor mistakes" in that it's easy to die, whereupon the player loses all their points.