Great concept and the movement of lucifer feels really good, very smooth. Nice to see a good execution of an action H-game. My concern would be for balance, as getting to stack multiple of the same +60% damage boosts really kills the challenge. I'd suggest limiting the items to just a single copy in your inventory. I did have a glitch happen during the boss fight where the screen got a yellow tint that never disappeared, even into the cutscene and when returned to limbo. It only went away on a restart. Definitely looking forward to seeing more on this project though.