Thanks for playing. Glad you liked it. We've done several Godot Wild Jams recently, and with their accessibility category we've worked to get a nice system going, especially for key rebinding.
We've been very happy with Ovani sounds, and use a lot of their stuff in our games. We didn't use it in this game, but they offer 3 different intensities for each track. They often do bundles on Humble.
The intro text was a late addition, and we added it to the existing dialog box, which did not work out as well as we'd have liked. If we do more development on this, we'll need to find a better way to present it.
We tried to give the feel of being in space and having to overcome your own inertia, so have very low friction. Adding thruster upgrades to improve your acceleration would probably help.