Wow such kind words, my friend! Thank you for this kind and thorough review.
Your complain was the same as everyone, about the instadeath lol. I'm working on some health system and energy system to make longer playsessions, I guess I wanted to be inspired by devil daggers but the most fun in the game is to keep on the level and listen to your song so dying fast is not as cool. Having a scoreboard is also on my mind so that people can keep track on how good they were on each song, though I think the enemy generation based on music is a little too random to make that consistent, but it may not be an issue, idk.
Your comment, and everyone's else too, actually made me get out of the inertia I've been found myself and now I really am willing to keep on with this project. I've been talking to a couple of programmer friends who can help me tackle the biggest technical issues currently happening. I really want to make the most out of the data from the songs and make it interact in a unique way with enemies, levels, and stuff....not just shooting flying dancing skulls lol(which is cool for a 7day jam but, c'mon, it's not enough)
I for sure will have something to show you in the near future, keep following please!