Two arcade games of the shooting variety - but with quite different targets.
Of the two, I liked Road Runner best. It comes in two parts. In the first, you have to shoot down moving fairground-type targets which move from side to side across the screen. If you succeed at this, you have to aim at Road Runner himself. If you hit him he is only stunned, and will pick himself up and move in the other direction. But beware - his speed will increase.
Millipede is of course a version of Centipede, in which you have to blast away all the segments of a long worm-like beastie zig-zagging its way towards the bottom of the screen. Slower than Road Runner, and needing less skill in timing.
The graphics are not ornate in these games, but movement is fast and smooth, and the controls respond well.