Needs more checkpoints or health items

[Zeric]

E2M1 needs to let you use the checkpoint more than once, or at the very least have powerup and health items in the arena room you get locked into with the blue key. I've had to replay the level 5 times now from before getting the yellow key and don't have the resources to make it through the massive fight. It's made the level extremely tedious and unfun.