@Toolbox#7934 Hey I just played Voidlock and see quite a bit of potential.
First things first please include a readme or in game tutorial that explains how the game works, because it took quite a bit of trial and error to figure out I had HP and a LOT of codes to get through. Even later I learned HP recovered and how much I lost when i was touching the red. None of these thing were clearly explained or visualized in the game so that caused quite a bit of initial frustration.
When I started playing I took things VERY slow because that was th dominant strategy. I wanted to keep my HP up cause I didn't know how difficult things would become. The music, which I thourougly enjoyed, kicked in, and like "Movement" I was expecting something to change mechanically as well... but nothing happened. I enjoyed the music, but overall it was a slow repetive experience, which didn't have to be slow. The only reason it was slow is that if I went quickly I would risk taking damage. Then I beat the game and it asked if I could go faster, which was dissapointing since there was no real reward at the end like teased in the description "What lies at the end?"
BUT then I played it quickly, and it made a world of difference. I imagined racing against an invisible timer that I'm suprised isn't in the game. This intense focus with the building music really put me into a state of FLOW, However every other code I always had to sit and wait for the red to dissapear, which made me lose the chance at the reward since all I got at the end was "go faster" yet again. You have a really solid concept here and just three things need to change to get every player into that state of FLOW instead of boredom.
1. Add an onscreen countdown
2. Make the red zones fade out almost instantly. The theme of speed doesn't work when you are spending half your time waiting. Instead drastically speed up the projectiles speed and fade time so the player has to rapidly dodge instead of sit and wait.
3. Whenever the music changes do something new with the projectiles. With "Movement" every new music change came with a mechanical change of unlocking a new area with a new layout. In this game the music does nothing but add visual effects. (The visual effects are pretty cool tho) Anyway if you change the bullet pattern, speed, or quantity you can make unlocking the vault more intense as the music and visual effects build.
Really all I think you need are these three changes and you have a great little game on you hands. Feel free to message me if you make any edits. I'd love to try this again to see "what lies at the end" of the vault!