Check your RNG 3 brimstone in a row should not happen within the first 10s:
A progress bar would be good, if unrealistic, so I can allow it. It was weird when the stairs starting shifting, but an escalator makes sense. Jumping could be inconsistent in that some times I could launch a second jump before fully landing, but the collision with brimstone was fair and accurate.
You are wasted on game dev, what a brilliant story line. Except for the creator being undone by a hoodlum, I could suspend my disbelief.