Thank you for playing!!!
Sound indicators are a little bit buggy overall because they were implemented last-minute, plus many of the sound effects turned out quieter than I expected this time around even with highest volume settings (there is a hit sound before you die but it's probably too quiet to hear).
Timer and healthbar stuff are Danmakufu shenanigans that are really easy (hopefully) to fix and I'll take that into mind for the next update.
Once again, I'm glad you enjoyed the game!