The first level was frustrating. You're trying to hit small, fast moving dots. The game sped up as you got upgrades. So the fun increased linearly, but I almost quit at the first level :)
The sound effects are good. I didn't encounter any bugs in the game (up to the level I played). It's not just a "clicker" game; the inclusion of a helpful "ball" is interesting. It adds depth to the game.
Congratulations.