Is it possible to make new sprites/balls while playing

[SteveJG]

It is possible to make Sprites, then hide or show them. You might benefit from this discussion

Create another component (Sprite) using blocks

Not meteors (snowfall) but you can adapt. [snow] App uses 9 Sprites. Hides them all. SnowStorm.aia (32.9 KB) Start, then every 15 seconds the app makes another Sprite visible on the Canvas at a random location until all 9 Sprites create a heavy snowfall. Change the image and you have meteorites falling. [snowBlocks] Useful information needed to adapt to your requirements. 15 seconds is 7500 ms. The app has 9 sprites, add more until the performance becomes sluggish. This is what o…