Glad you like it! I'm working on an update right now and there is already the option implemented to sprint by holding a button instead of double-tapping. Sadly Godot (the game engine I'm using) doesn't recognise both shift keys as different buttons, so I'm mapping them to CAPS LOCK/N (p1) and SLASH/period(.) (p2).
I'm in a bit of a busy 2 weeks with school right now, but once I'm done I think I can update it pretty soon. If you have any more suggestions for the next update, let me know!