Alien

Small overview: 'ALIEN is a shooting game in which a player controls the Carriage attacking monsters from Outer-Space. There are six missions in the game, the player can only play each mission in the ascending order.' (Brandon Cobb)

For those who are wondering, this is a R-Type clone.

00:00 - Start
00:13 - Stage 1
02:29 - Stage 2
04:16 - Stage 3
06:46 - Stage 4
11:44 - Stage 5
14:16 - Stage 6
17:13 - Ending