Unable to play due to lag. Every once and awhile, I come back and attempt to play. However, the lag quickly builds up until my mouse freezes every couple of seconds. I run the game on Chrome with Win 7 on a desktop.
Loaded up a saved game, went into the Pit Room where I had previously been trying to get all the safe points. Only had two missing. They are still all highlighted green, but the achievements for each for no longer highlighted. However, the achievement for the number of safe spots is highlighted. I have a screenshot.
 "Cube Escape: The Cave"){kind=icon}
 "Alice is Dead Episode 3"){kind=icon}
 "Achievement Unlocked 3"){kind=icon}