Here is 60fps and 58% cpu (i5 3210m, 6gb ram, internet explorer 11)
Btw Katala, what is the angle of diagonal movement in your game?
I noticed that in your games the character movement is perfect/parallel with the tiles.
I am using tiles with the same proportion as yours 2:1, but the closest I get for this parallel movement was moving diagonally with 26.5º.
I would be so glad if you could share how you do it.
Thank you. (and sorry for the bad english)