Thank you for the detailed response and really appreciate the feedback.
Agree with the missing sound effect for killing the enemies... not sure how I missed that actually.
Regarding the movement, this is intended to be brought over to the mobile where mouse does not exist so did not think about it, but agree that having a keyboard button to switch follow on/off and another to activate the flash would be good additions for web.
Edit: Glad to see others are using these jams to improve their skills as well, makes me feel better when I focus on learning opposed to polish.