The actual hitbox of the bullets is only the glowing blue part. They aren't really that big; they only give that impression, but it would surely be clearer with a smaller sprite, like a literal circle. Thanks for your feedback. I will look forward to changing some of the sprites to give a better indication of the bullets' true size.
The indication of damage is the sound that plays in the installable version. The webgl version removes it, but it is truly a shame that time didn't give me the opportunity to finish the lifebar system for the player. I think the same about the lack of indication, and it's the first thing I want to fix. Thank you so much!