Searching for tentacles on the internet is…uh…well, let’s just say it can flag up some pretty way out stuff. Good work, Japan! But this is some safe-for-work, tentacle-related entertainment.
Once you’ve got bored with playing with the default monster, you can open up the control panel and screw with the parameters, including head size, tentacle length and gravity.
If you’re a dev, you can play even more by grabbing the code from GitHub and making your own take on this.
But really, I’m writing about this because tentacles are cool. Not Japanese specialist magazine cool, though.