Originally Posted by vitux
It could also be that Mr. Twiddy obtained the property your engine and use it in Putty for System 3. And the reason for cancellation was another.
Conspiracies and intrigue are entertaining
It's not that unlikely... somebody has also mentioned that there's music by Andrew Barnabas (Dens Design) in Putty Squad which could also be owned by Virgin. Or Putty Squad used TUME and System 3 didn't have a license:
^ Note that all of Twiddy's jump'n'runs seem to use TUME so it's likely that Putty Squad uses it too.