It got very fun since you updated. I played on the browser and got to level 5.
There's still the problem with the performance, but it's not a big deal since it's on the browser (the problem with the performance actually helped me, since it makes the balls more slow XD).
There's a thing about the performance that I find it curious and therefore think it's relevant to point: when you get to the next floor the performance gets a little better, even though the combat state seens to remain unchanged.