Hi Qu0d0! Thanks for the precious feedback! The bullets gets faster when you pick up the yellow Bullet-Speed boxes. It's still one of the things I didn't know how to calibrate. I'll try making it even faster then!
Visual indicator for the aiming is a really good idea, I'll implement it for sure just after the period of rating finishes!
Be sure to add the game to the collection to check it for the coming updates, thanks again :)