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Without cheat engine to slow the game down, this achievement is impossible. 10 maximum 'maybe' but honeslty 5 is the natural limit. You cannot possibly expect us to juggle the same coin 30 times.

What were you thinking?
wait I know... steam achievement farmers.. make it impossible for them.
7 is reliably achievable.

The main problem though is, the program just throws 4+ targets at you the same time constantly, and THAT makes it reliably impossible.

But I assure you, this is how it worked as a flashgame too, so duh.