haha, once you open the door the enemies start spawning in the teleporters inside the catacombs and they are very fast.
To reach the higher pillars you have to use the biggest power, the one which make an explosion, aim down and jump, while you are going up shoot and the explosion i going to give you an extra jump force.
About the checkpoints, i don't plan to add it to this level because is just a demo level, it was planed just to show i'm working and making progress in this game. My idea is to make an RPG.
Anyway, thanks for play it.