Hey! Thanks a lot for the thorough review, they're always welcome!
First, I know it's not the typical bullet hell and it maybe shouldn't be called as such, but it does involve some bullet-hell like mechanics with the turrets so that's why I addressed it as such (also because bullet-hell is more attention-drawing than random-lava-avoider lmao)
Second, the music was done in FL Studio 20, but I did one or two sond effects in bfxr, which is a simple but convenient tool to make 8-bit sound effects and which I really recommend using for this kind of sfx.
And about the rewind mechanic, you actually get punished in several ways for using it, the most relevant being that the turret's fire rate goes up to balance it against them not shooting while you're rewinding. I ended up nerfing this a lot, but it can still be seen pretty easily if you play levels like 3-2
Thanks a lot for giving it a try, and I'm glad you enjoyed it!