very very laggy

extremely laggy on 2Mbit/s internet connection. takes several seconds for each action to take place, sometimes freezes for up to 20 seconds and more. don’t have anything downloading.
is there a problem to set a “light” interface without pretty image and sound effects? i don’t care what it looks like, it kills the performance and distracts a lot from the puzzles.

Sorry that you are having problems. Quality options are in the bug tracker as number 305.