Windows Super Prowler - Game Boy style stealth game

Looks good. Are there any other games with a grip meter that you're aware of or did you come up with that? Little things like that make such a big difference.
Thanks. I added limited grip strength so the player would have another factor to consider when sneaking around, so it just made sense to add a meter. But come to think of it, Shadow of the Colossus does pretty much the exact same thing. I can't think of any others though.