This has such great atmosphere - the structure feels appropriately oppressive, and nice touches like whirring vents and hissing steam really bring it to life. Especially zipping past them at mach speed with the grappling hook, which takes the tedium out of navigation; each dead end was kindof invigorating, giving me a push to track back and try other paths. It would be awesome to see the turrets fully implemented - as soon as I saw one, I instinctively shot because it simply looked evil, but it would cool if they were out to get you too. Great work!