Scoring: let's say you've got 5 hearts in a row. Only 2 symbols will combine/stack when you tap a blue arrow. The new heart stack will now say 2. The others will not move/stack.
If you combine a green 2 with a green 3, obviously you'll get 5 points. There is a distinct strategy to maximize your points when you have the option of stacking up/down. The direction you choose can matter, but not always.
Let's say you've got 3 blue diamonds next to each other. Left to right, their values are 1, 1, 12. If you tap left, the 1 & 1 will combine. Then the new 2 piece will combine with 12 for a total of 14 points.
However, if you tap the right arrow, the 12 & 1 combine for 13 points, then the new 13 piece will combine with the other 1 for 14 points - yielding a total of 27 points.
The game ends when you have no more identical pairs to match.
Pushopolus has a healthy element of randomness/luck and is extremely fun. I'm very impressed.
My first game: I scored only 21 points. My second game, something like 85. The next day and a half, my high score grew to 3435. I could not stop playing this game.
The following day, I showed it to somebody and they pointed out to me that in the bottom right corner of the screen is the next piece! Somehow, I never noticed this, probably because my right hand simply blocked it. And I didn't read the rules thoroughly!
I hope the developers make another version of this game where you never know what the next new piece is.