Thanks very much! :) Yeah I've come across some lag problems too. Was that the browser or the desktop windows/mac version? I'm hoping to be able to fix that in the future. It's on the list!
Also, maybe you saw this already but you can sign up to be a playtester: here if you're interested. Then you'll have the chance to play some new levels pretty soon, I'm planning to send out the playtest game keys by the end of January and that version should have 15+ levels in it.