If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Mosaic - Tomb of Mystery
Spacebar - Rotate.
In this original puzzle game you need to place mosaic pieces onto the board so they fit well together. Your goal is to completely fill in the shape on the right with mosaic pieces. Hurry up because if the space where mosaic pieces fall gets full, you will lose the game.