I summoned a demon inside a cathedral and now its collapsing

My entry for olcCodeJam2019. Written in c++ (self-taught n00b). I used javidx9s olcPixelGameEngine for windowing, keyboard input, and handling PNGs. I had to move apartments over the first weekend so I didnt get much time to work on it, but am submitting what I was able to get done. The idea is that you summoned a demon inside an abandoned cathedral, which has caused it to come crumbling down. You must escape through the top of the cathedral, by jumping from falling stonework. CONTROLS: arrow ke...