User blog:TheObjectThing15/Roblox not working?

I play Roblox on a Chromebook.

It works but with some problems. It may not sound like a lot but it is really annoying. I tried this on 2 Roblox accounts and I get the same result every time. I even restarted my Chromebook and tried different Roblox games.
 * Sometimes I can't move and then I suddenly can
 * The screen keeps getting brighter and then gets darker and so on
 * I can't chat with anyone in game
 * Whenever I join a game there is a message that says chat may be slow

If any of you have a possible solution please tell me.