I love the asthetics of the game right away. Small suggestions: in the opening text (or any text) indicate z to advance hehe (very small thing but I sat and stared at it for longer than I needed to!).
I get the concept but I couldn't see the screen flashes (other than yellow) suggesting I was looking at something worth investigating though I stumbled on some so maybe a little more intense feedback for that bit.
I didn't finish this but I did enjoy it and thought the sfx (clock ticking) and art really came together to make it quite eerie... not to mention the things going on around the game lol. well done :)