The fact is that when it comes to SMB the physics are a make it or break it kind of deal. If he hadn't spent that time tweaking them, SMB wouldn't have had a ch

The fact is that when it comes to SMB the physics are a make it or break it kind of deal. If he hadn't spent that time tweaking them, SMB wouldn't have had a chance to succeed. And I'm not saying that the physics are the key to its success, but they definitely were a requirement.