First of all, damn the music's good, the intro is cool too.
The one "issue" i had with the controls (i'm playing with a controller btw), is that when i aim, the character doesn't aim in the direction i'm pointing at with my joystick, but is behaving like the arrows, rotating the player left and right. i don't know if that is intended, to simulate older games though. After playing for a while, i got used to it anyway
finished the 3 courses and i think the challenges do a really good job of getting the player used to the controls, to the powers and the way he should use them.
Your UI and settings seem to work well too, i didn't run into any issue.
Best i can do is three fiddy