Thank you for allowing us access to the knowledge (although it is referential) of this theatrical work, which, for your information and comments, is shown as a work of great interest. I can notice that there is a first-order intertextual game in it. Not only because it is based on the story of Hamlet, but, above all, because it recreates and transforms it, in some way, from that different perspective. It is undoubtedly a work of great irony (and perhaps some black humour). In addition to the themes you allude to (doubts about identity, the consequences of passivity, which I think are very Shakespearean), I could conjecture a critical and playful look at representation (in life and in theatre, also very Shakespearean).
Grateful for your great post, @honeydue. Greetings.

PS: Could you indicate the title of the film with Gary Oldman and Tim Roth?