Hi thank you and thanks for letting me know! :)
I'm aware that there are quite a few lag problems with the game, is the with the windows/mac version or the browser version?
I'd really like to try and fix the lagging problems, but I think I'll need to do a big system overhaul to fix that and I'm concentrating on adding new levels at the moment. I might have another look at it and see if there is an obvious problem I was missing last time I looked into it.
In the mean time, I think the browser version doesn't have as many lagging problems as the desktop version, so if you were playing the desktop version I'd recommend you play the browser version for now :)