There's quite a few joke levels that people make, but that one isn't really one of them! I'm not seeing you finish it in any of the replays that you posted, there's another cannon later on that launches you over the spikes and onto a car. I think you're maybe not linking to them correctly, you have to first load them from your profile.
Anyway, for added challenge on that level, you can always try to finish it without injuries, hehe. I've only managed it once, I think.
