I really like this take on the theme. Also the effects are well put together to make everything feel very responsive.
I went into the game expecting to be able to let loose and I got some of that but I was hoping for more. Perhaps a "go to town" moment where you can just go crazy on the keyboard making insane combos without the issue of messing up the keyboard. A lot like how many bullet hells have those super moves that you can use once in a while that just clear the screen and lets you stop focusing for a moment and just go all out.
Fantastic especially for your first game. You should be very proud of it.