I'm really happy that you liked it, thank you for your feedback. The last ship bug is really critical, because I made 3 levels and the boss level, but as I understood no one met the boss :D But now I'm working on postjam version, I already fixed all bugs and working on improvements, including sound :) By the way, here is my devlog about postjam version : https://ezaki.itch.io/join-me/devlog/263909/update-1-complete-post-jam-version-announcement