I played this on linux and it seemed to work fine, but I didn't have sound. I'm not sure if that's because you didn't add sound yet or the linux release for godot didn't work right. In any case I liked your shmup. As far as the abilities, I think it would be good to have a visual in the hud for the cooldowns on the dash and ghost abilities as well.
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Thanks for playing! No sound yet.
Hmmm I don't know if it's such a good idea to have those cooldowns in the HUD. I mean, like, the ghost ability has less than a second of cooldown, yeah? That's definitely something you wouldn't be checking. Rather, I was thinking players would eventually learn it by heart. Like at what pace you can press buttons and have them actually come out. Did you still feel uneasy about your inputs after a little while playing?
I was thinking showing the cooldowns in the tutorial, would that have helped?
could be visual or something like a diagetic sound like ca-chunk or whoosh when you can do a particular ability again. I would say take a day and look at how twinstick shooters like binding of isaac or nuclear throne handle the hud for ability cooldowns. I envision something like risk of rain's cooldown counters. If you want something closer to home in bullet hells I would say check out the UI in xbla dodonpachi series. I thought the game felt just fine to play. Initially I felt that the dodge and the dash seemed to overlap in functionality, but I used the dash as a gap closer to hit gundams that run away.