Thanks for feedback :)
Answering your questions/feedback:
1. Projectiles go down and up (also diagonal), but when you move it looks like they aren't on the same place. And no you cant control projectiles (only if you choose upgrade).
2. I haven't added difficulty progression to game, that's the catch :)
3. I don't know why i didn't do that, i just thought that it would not fit in.
-Matissoss GameDev