Thanks for your review. Honestly, I had to use few hack to increase dev speed. Initially mobs have almost the same script as player, except they move randomly. THat's why their life is huge, I forgot to reduce it ;-) I also spent to much time coding (without noticing :-p ) and tried to quickly my levels. Also, as I knew to well what to do, I finished learning patterns to avoid mobs and collide on purpose with other just to collect keys and go away... Some how, I "speedruned" and abused my own glitches to test it forgetting about your experience :-/