This game is very difficult. I managed to complete the first level, though only because I went backwards, fell down to the lowest platform and rolled to the flag somehow. I did not actually get to see any other balls to merge with?
In the second level, you seem to be starting "floating" in the air rather than on a platform. At some point, the ball just shoots off in a direction and no way to control it. I see the rings on the platform below but the ball does not want to fall to it.
I have no experience creating 3D games, but I think the game can become more playable if you place it in a closed room instead of this enormous open space where you constantly fall to your death. Especially in early levels where the player needs to get familiar with the game. In Mario Kart you start with a simple map like Luigi Raceway, not the Rainbow Road :)
