Thanks for the feedback. Yeah, complete separation of aiming and movement is an awesome mechanic and would be the dream, but without a mouse or twin-stick controller our feeling is that it's impossible to pull off without massive compromises. We've thought about ways we could use the six-button version of the Mega Drive controller, but I'm still reluctant to go down that path - I never had one back in the day, so it doesn't feel like "authentic" Mega Drive experience to me. And even with the extra buttons, the worry is that it would become slow and fiddly, sacrificing other elements of the game we're ultimately trying to make. This tech demo gives us the chance to play around with fundamentals like the control system, though, so I'm sure we'll experiment some before moving on.
Speaking of an authentic experience, it's awesome to see the demo be played on a CRT. I feel like I understand now why there are musicians still putting out their albums on vinyl :)