itch.io

Thanks for the feedback! You are most definitely right about beat emphasization to make it feel better.

For the notes, it's actually quite simple. 

1. First of all notes have these variables: Timestamp (Time when they should appear) and the key to be pressed.
2. I have another script in place where I can enter "Record" mode. What this basically does is plays the track, and records my keyboard presses. Then stores all of the keypresses into a big list. Basically, what you see, was actually me "playing" the game in free mode to the beat. (On one track I did it from the first try, mashing the buttons to the beat to what feels great ; Being a  DJ myself probably helped in this scenario)
3. After recording, I have a big list (over 300 notes) each having their time and key recorded automatically.  Then I exit the record mode and put the script into "beat map generator" that basically takes the big list, and spawns all the notes in their places with the correct angle depending on it's key.
4. if everything went right, you now have a beat map that you can place into the game.