Hey! Thanks for playing the game! And I'm happy to hear you like the music. I haven't listened to it in a while so I'll check it out again.
All of my games on itch were made with HaxeFlixel except the Electrennis, which was made with Love2d. I really haven't done game development in some time now, but if I were to make this game again today I would probably use Godot, or maybe Unity.
The music in this game was made in Reaper (the DAW) with a bunch of VST synths/effects and drum samples.
Thanks again for checking this out! It's nice to see people still finding their way here and enjoying this game.