Thanks for your answers!
On my system the game just runs very very slowly even with WebGL on. There is no blurring though (other than the characters looking like theyve been stretched from another resolution).
Pretty weird since the game is currently light and simple. I tested it on 4 computers (including my laptop) and it runs at 60fps... :o
Can you tell if this appears with other games by other people, or even the tutorials?
I recently played emulated and flash games but this is the first time I see such a blur on the main character. But obviously, it could be because it is my game, maybe I pay attention to things that I usually don't care. And most games are centered on the main entity, with scrolling etc. In this game, there is no scrolling and the action is fast.
I'm gonna try more games and watch more carefully.
You could try always rounding positions of objects and the scroll x/y.
Yeah, it was the first thing I tried and it didn't fix the problem :(
It could be the response time of LCD screens. If I drag the entire window I see a slight blurring effect, but it's due to the LCD pixels taking a few milliseconds to switch.
Ok, so in this case... It is an unfixable problem, I suppose? (since it's actually not a problem)