Thanks for playing! We're going to do our best to implement solutions and missing features regarding most items in your list!
A bunch of features regarding visual effects and settings are already on our to-do list. We're also going to look into adding something that points you to the next objective with more clarity, aside from streamlining level design.
Unity's cloth system is unfortunately extremely buggy right now and only gets worse with each version, so we'll try out some third party plug in soon, probably disable it in the meantime.
Audio is completely temporary, as sadly none of us have any knowledge in that area.
If you play with the second lance you'll find that move is already a possibility ;) We'll include an ingame explanation of movesets later on, but for now you can find one in the game's page.
Health recovery and possibly energy boost pickups are something we have planned for the future, we're thinking on the best way to go about it.
The dash damages all enemies you go through with a pretty wide hitbox, which is the reasoning behind its elevated cost. Do you consider it to be too much even then, or did you not realize it could do that?
Thanks for all the feedback, even if I didn't reply to specific bits all of it is very helpful and written down in our list now!