Awesome game! I was hoping for some time pressure... however I found it quite hard to get the double jump and stuff working. Maybe a game that works better with custom key bindings. Also that bug with the conversation was a bit irritating at the beginning but as you announced it, I could deal with it.
I liked that 2 color style. Although, you somehow broke with it for the green colored text parts. But that was kind of cool. I somehow feel that the time left should also be reset by the inversion zones, just seen logical this would happen... also destroyed blocks were not restored when inverting time. I like the overall atmosphere created by the intro. I motivates a lot.
I would totally love to play through the game, but need to rate some more games now. Will come back later and try my luck again!
PS: Made it until the red key. But then messed up the blocks to run to the red door.