(Edit: the bugs don't appear anymore on my machine, the game runs smoothly)
~~Bug 1, the game doesn't scale well to fit the browser page size. When I start at 100% it is cropped like this:~~
I had to scale the itch.io page to 150% so the game fits in the html block.
Bug 2, something is wrong with movement. Sometimes I move a box 2 squares while the dude only moves one square, sometimes he get stuck in a box like this:
It seems like the objects are updated in different order each frame and it changes their behavior.