There are several apps on the market that just have one game mode and that is
a single-try run. In this one you control a berry as it rolls down a
never-ending slope. You can jump and double jump to avoid enemies, grab coins,
or grab other berries. There is a berry counter on the side of the screen which
allows you to change into the color of a collected berry; once you have three
berries, any more berries grabbed will replace the three you already have. As a
chosen color you can go through enemies of the same color as you. If you can
stack three berries of the same color you will go into mega mode and roll a long
distance as an unstoppable force.
The speed you roll will increase with each leg of the track. It will come to
the point when the items and obstacles will fly at you and it will soon be game
over once you take on too much damage.
Any app with only one mode needs that one mode to be unbelievably addictive
and replayable. I have yet to find one, and this app will meet the same fate as
the rest: deleted after less than 20 plays.