I personally enjoy my daily game of Serengeti Shuffle, however the timer doesnt provide much fun once you've submitted your score.

I propose that there should be an Endless Mode option where there is no timer and no prizes.
It's just one general relaxing game of match them tiles up.
Still implementing the heart system, so when there's no more matches the board resets and continues until all hearts are gone and it's game over

I think it would just provide us a chance to just relax a bit more and unwind, who doesnt love a good slow paced game at the end of the day? plus it's a handy time filler for when we're waiting for our pesky energy to regenerate.