Thanks!
Yeah, audio is always a problem for me, don't fancy the idea of using somebody else's stuff but never have the time to work on it myself, nor really know how I would go about doing so. It's something I'll definitely look into at some point. =P
With the walls I debated changing a few things, like maybe raising the player a little further off the ground, but I found that at lower speeds you usually still have ample time to aim after clearing the rubble and at higher speeds it goes by so quickly it's not much of an obstruction. I did add a stipple effect to pieces that are close to the camera, might play around with the settings on that to make some further away rubble still partially transparent. I also have been considering the possibility of giving the player control of their movement up/down and sideways, adding a flight mechanic and further obstacles which must be dodged rather than shot, we'll see if I work on this more post-jam.
Arrow path indicators I'll look into, honestly not too sure how to code something like that, but given it's a staple of many games with grenades and the like I'm guessing it can't be too hard to implement. Certainly sounds like something that could improve the game, especially if I add the aforementioned flight game mode/mechanic.