I have this shaking, too. And some other things happened: After finding out how to use the potions (why isn't this in the description?) I played (SP) with the mage. But I am not able to reach a good spot in the highscore table because the game suddenly stops without a good reason. I did not die! It happened twice (there is the "A winner is you" image in the background behind the highscores) and after that it is impossible to play again because the enemies are stuck at the edges of the world. Reset or refresh does not help. The only way is to leave the site and come back. What's going on here?

it seems like u won, without killing so much enemies. did u kill two samurais`? oh, and next time just click on the scoreboard to retry

I just killed like hundreds of enemies, but after killing the second samurai, there was that "A winner is you - You killed 20 Enemies" and the scoreboard again without getting a new highscore. Clicking the scoreboard did not do anything. What am I doing wrong? Isn't the goal of the game to survive by killing the enemies or what do I have to do?

The update did not prevent the screen from shaking but the other problems were solved. Not in the first try, but in the second. First time after the update I still could not click the scoreboard because the game paused itself. Now it seem to work and I even see the instructions. Now I only need to find a way to not kill the samurais but all the others. ;)

oh good do u think i should make something else to determine the end of the sp`? oh, and the shaking cant really be fixed as far as i know

Maybe the only end is the death :D Why does it shaking? You can only see new comments when refreshing the page. Just noticed it, too.

oh, i got the error with the score when u kill a samurai ur score should be increased by twenty, but i accidentally wrote that it is set to 20 and i fixed the bug with the enemies

I just looked through your code and found the =+ instead of +=. But I was too slow to tell you. Another thing is, that the potions can not spawn at the top, but at the bottom, because you divide the width and height by 10 and multiply it by a number from 1 to 10. Either you should do it 1 to 9 or 0 to 10. I will try getting a better score tomorrow, already too late now. ;)