All progress made is lost after the flash window is closed due to how save data was written to be held server-side rather than user-side
After a level is completed, the game will go to a black screen for about twenty seconds before resuming
There is a bug that causes the game to stop working. This occurs randomly but will usually pop up after about eighty to ninty minutes of playtime. This bug can range from buttons refusing to accept input to the game not progressing past the black screen that appears after completing a stage