Thanks for playing and good feedback. Lots to think about.
>ceiling bug
It occured when enemies died in the clouds. The bounce is just so the player doesn't stay in the floor or ceiling for too long.
>bullet visual viriety
Actually bullets are color coded. More red = more damage, but it's impossible to notice without staring at barrier display when hit. Also differences between yellow orange and red are probably too subtle. I'll work on that and I think I'll add damage pop ups for player.
>last 2
Till now I was so focused on all the technical stuff to get this off the ground that I forgot to work on the personality of this game. It's very bland now.
I was considering girl planes, but I couldn't come with anything cool looking and then I saw some anon was making something like that already, but in 3d so I dropped the idea (that was long ago, I don't think he finished that game).
Now that you reminded me of this I'm concidering it again. I always wanted to have a main character and that could be it. I'll see if I can come up with a character design that I like.