Thanks for explaining the beginning level mechanic in the comments. I wasn't sure in the beginning that you were supposed to die - and that the progress bar determined whether you go to hell or heaven.
Nice theme implementation into your game after all.
And fun lil quiz at the end - (but isn't it called derivative instead of integral?)
Nice show of mechanics using shooter mechanics, AI logic and UI elements. Keep up the progress!
Great job creating a game and submitting!