Yeah, I originally had corner goals in the game and obstacles that made diagonals throws necessary but later cut them out. I could've (maybe should've) disabled the buttons, but ended up just leaving them in for the jam. When playing I usually only use the base 4 directions as well.
As for the audio, apologies for that! I was messing around with trying to get a volume slider in before submitting and couldn't finish it in time. I usually keep my computer sound relatively low and didn't realize how loud the audio must've been. Definitely something I'll keep in my going forward.
Glad it was still a fun gameplay loop for you, and thank you for the kind words and feedback!