Can't wait to see it for the ZX Spectrum Next. IMO, your use of Speccy's colour palette must be ZX Next's standard. Old, well known and loved colours without colour clash. Simply perfect. By the way, you can ask for payment, your level deserves it.
Thanks, but no payment required. See the reasons here... http://www.bitglint.co.uk/MelkhiorsMansion/FAQ.aspx