Nice game. 

enemy's movement are good different than normal. 

Power up's und difficulty is in good balance. 

RAAAAAAAAAAAAAHHHHHHHH DEATH TO THE EMPIREEEEEEEEE RAHHHHHHHHHHHHHHHHH RAHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

This is soo gooood!

Such great execution of an old school shmup! Music and sound effects fit real good with the whole aesthetic. Controls are good, UI/UX are excelent. And I love what you did with the color palettes for each segment of the game. It does make you feel you are exploring REALLY different planets and fighting various factions.

Really good job, Sul!