Over the holiday I had some time off and decided to just develop a small clone for the browser for no particular reason.
It's one javascript file of about 850 lines, and took a few hours to complete. I purposely kept things very simple, unsophisticated, and sub-optimal, and just had fun with it.
Each play through generates new random patterns and speeds (F5 refresh to regenerate).
You have 3 lives. To win, get 5 frogs across the river to the bridge.
Use Chrome or Firefox.
or grab the source: https://github.com/y2kiah/frogger