Thank you fisher.
I'm happy to know that my game works on other people's computers and that the possession mechanic is fun. My tester's failed to test an early build of the game due to anti virus false positive problems which even caused me issues when trying to package the final game for Windows. (Thanks for deleting the game executable I'd just packaged Windows Defender)
Yes, the game definitely needed some onscreen instructions which I should have implemented before submitting, even just a hastily made instruction screen before the core game started.