If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Tidalis features an addictive new “streams” mechanic. Simple yet addictive at core, even the lite version of the game is overflowing with options, special blocks, and game modes.
Hold the right-mouse button (or Z) and drag to turn blocks; left-click to emit streams. Button in upper right controls fullscreen mode.