Thank you! Yes, that is a problem with the browser version. I noticed also that in browser, when i have many tabs openend the sound is delayed (jump sound and music while casting starts a bit too late). 

thank you much :)

Thank you much, TomToad. Yes, the area, where the player is damaged is a bit bigger than the Sprite of Wooshlek. It s around the collider that checks collision with walls and ground. I tried to keep it small, but it is still too big. I will try to fix it after voting period.

Now i was able to fix it, now too big colliders should not be a problem anymore. They are much smaller now.