Oh For me, I set the browswer scale to 50% and was able to play it. I didn't go to far but I would like to come here and say it is a GREAT GAME!
The art, the music, the core game loop they are all perfect. It is easily one of the best games in the Jam IMO. I can't believe you made this within 9 days. Very polished and feels like it is ready to be put up on game stores.
If you end up releasing it on pc or mobile I'd definitely like to own a copy!