Really good—keep going, do more, add some music, or make a Doom-style level. It's really cool... Congrats...
I just talked to the original authors of Dread (now rebranded as GRID). Apparently they have plans to officially port this one to Mega Drive. They have a prototype based on the same codebase but also a much newer and shinier codebase. After they are done with the original Amiga release, they plan releasing not only a polished Atari ST and Mega Drive experience but also release the engine as a framework with easy-to-use development tools. AKA what I had planned for this too. Heh.