This is a modest try to make a Missile Command clone. You control a sight to shoot planes and destroy their bombs before they reach the land. The keys are I, P, Q, Z and O fire. The program warns you that the cursor must be in L mode. In C mode the controls won't work. Also, control your energy and time levels.
It's hard (and strongly slow) to move the sight. The on-screen instructions says if you press the controls + caps shift, they'll go faster.
A hard game that probably will get on your nerves.