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Try changing the speed of the game.

Go to 'Options' at the top left of the screen and you'll see 'Speed Settings'. This can be altered from 10 - 100.
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Polly77: Try changing the speed of the game.

Go to 'Options' at the top left of the screen and you'll see 'Speed Settings'. This can be altered from 10 - 100.
This. I set it to 60-70% and it runs smoothly.
Useful keyboard shortcuts:
[ = Slow game by 10%
] = Speed up game by 10%