Thank you so much for your feedback! I agree that its absolutely a difficult game that can be hard to enjoy in practice. I'm not sure if the hurtboxes are the first thing we'd go to adjusting, but there's absolutely clarity improvements that should be made alongside difficulty tuning.
I'll update the description, but on its own merits I totally agree that the game should really convey the ammo, dash, and healing gains more clearly. Fun fact, the HUD was actually harder to read right before we submitted (the background was added in the last couple hours, which changed a lot how readable the text was) but our original mockup had it super clearly isolated! We kinda forgot about that.