I have noticed in Itch the music seems to stutter and glitch as you play the game. In 0.5.0 I have changed the audio framework to an external non unity one, this issue seems to be exclusive to playing in browser and does not occur in steam, if experiencing this issue I would suggest try the game on steam for a better experience.
This should be fixed with v0.5.1.I am aware of a pretty major issue of ships just not shooting at Barricades correctly which I am working to fix quite quickly as it can be entirely run ending if your ships just sit there and don't shoot.