Did you know, this was actually a series of six 'parts'. Only this one (Part 5) still stands, the rest were deleted, Parts 3 and 4 at the hands of Psi43 in 2009, who presumably uploaded it instead of Anigen to get around the two submissions per day limit, as these were posted in a span of two days.
In reality there were only really two versions, the one you're looking at right now, and a second version with rtil as a poorly cut out sprite:
In a response by Psi43:
"No, actually 6 flashes but 2 different versions. One is with rtil (the green pyramide head guy) as a sprite, and one with him drawn in photoshop. 3 Episodes of the photoshop edition and 3 Episodes with him drawn as a sprite. Thanks for the review."
Also worth mentioning is that the Photoshop version says 'and then rtil died', while the sprite version says 'that was incredible'. The sprite version also has the text 'amazing graphics' in red and green flashing about the main action.
This is proven when I right click and click 'Inspect' to view each flash. The Photoshop version is called 'rtil1.swf', while the sprite version is called 'rtil2.swf'. Part 4 is actually called '396851_rtil1.swf', but it's still the same flash as Part 1.
Sprite version download: http://uploads.ungrounded.net/397000/397092_rtil2.swf
I'm very grateful that the Wayback Machine was able to capture all six parts to this incredibly overlooked and triple-recycled series.
Part 1: http://web.archive.org/web/20100531121747/http://www.newgrounds.com/portal/view/396851
Part 2: http://web.archive.org/web/20100716204517/http://www.newgrounds.com/portal/view/397092
Part 3: http://web.archive.org/web/20071201150933/http://www.newgrounds.com/portal/view/398248
Part 4: http://web.archive.org/web/20080307214647/http://www.newgrounds.com/portal/view/398249
Part 5: you are here
http://web.archive.org/web/20100716203202/http://www.newgrounds.com/portal/view/398291
Part 6: http://web.archive.org/web/20100716203207/http://www.newgrounds.com/portal/view/398293