Juno First is intended to be an Atari 2600 port of the arcade game of the same name. Naturally the Atari 2600 version requires some significant simplifications, but the main elements are there. The visual style of the game is similar to Beamrider, but it plays quite differently.

The awesome sprite graphics were created by Nathan Strum, and the the excellent title music was created by Erik Ehrling (moderntimes99).

Changes:

Blue sky is now shown while you are invincible (it also flashes just before the end of invincibility).
There is a slight pause before you reappear after dying (let me know if it is long enough).
There is now a time bonus at the end of each wave – it is shown in the score area while the wave number is displayed.
Each wave is now 60 seconds long (previously 40 seconds).
Included some new speech from mos6507 (more next time).

http://www.atariage.com/forums/index.php?showtopic=125269