The level design is outstanding. I've noticed some really ingenious layouts all over the game but I finally found the last enemy in level one and man... I thought those glide jump paths in later levels were sneaky but here in level 1 was the sneakiest I'd found so far. I actually thought it was a glitch because I went over the level many times searching to no avail.
If it's any help with save size I think I'd be ok with/without blood on the ground.
Hey there's friendly fire amongst enemies! And boy it helps in the last level. I cleared out all the enemies in the open ground and let the ones in the cave kill themselves a bit but unfortunately got taken out before I could reach the finish. So close. It's neat though to see their shots and bodies explode behind walls, reminiscent of the Farsight gun in Perfect Dark.