Used to be good, now it's bloated with ads, tracking, social media and "bonuses" for extra money.
Love it so much fun
Was great until it reset and lost all my progress. I have no idea how this happened but one fine day I open the game to discover all my progress (through 3 regions) is gone but my Google game account and achievements are still in place. Doesn't make any sense!
All I know to say is that it is a fun game and is well worth the price. If you have a stylus I would recommend using it, because in my opinion it makes it easier to draw a beam on the grid, without your finger being on top of it, because if you do that you can't see the beam. :)
Game progress is not synced between devices and after last update I lost all my progress on tablet. And its really boring to finish levels again.
Savegame can now be continued from the FREE version of the game. However, in order to make this work you have to grant the app access to the external storage (pop-up at program start).