Fine work. Whenever you see an ST game that's vastly inferior to the Amiga version, you have to think an STE conversion could have eliminated the gap. This version, with its smooth fullscreen scrolling and colourful graphics, is evidence as such. The view range here means you can actually plan ahead and coax the ghosts towards you before picking up the powerpill, in a way the tiny view area on the disappointing official version denies. You'll smash your ST version high score within a couple of goes.
There are a few bugs (hit a powerpill and enemy at once and you'll often both lose a life and the powerpill disappears, and enemies occasionally appear to be in thin air) and the music isn't an improvement. Plus, the fact that it needs 2Mb compared to the 512k of the standard version means its not 100% conclusive proof of Amiga v STE, but this is one guy coding in their bedroom as a hobby, so who knows what a full professional team could have done within 512k in 1989?