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I really want to get Prison Architect, but after watching Yogscast Sjin play it I've noticed that he says the scroll wheel and middle mouse button are prominent buttons. I have a trackball that has neither a scroll wheel nor middle mouse button. I don't want to buy a game I won't be able to play.

Is there a way to change the control scheme in the game to avoid the use of these particular controls?

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The game is still alpha phase; beta phase you will probably have better luck with key mappings. You could buy a decent mouse for $20 and never have the issue again, but if you don't want to support the game in its current state there's nothing wrong with waiting until it suits your gaming setup. – Sadly Not Feb 2 '13 at 2:41
Experimented a bit and discovered some unlabeled bindings. Edited my answer to reflect. – harbichidian Feb 2 '13 at 20:20

You can use WASD to scroll the map, Q and E to zoom, and R to rotate items. No middle mouse button or scroll wheel needed.

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You can also use 1, 2 and 3 to change the game speed.

As @harbichidian points out in the comments, use Space to pause/unpause.

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Toggling pause via the keyboard would be great. If anyone knows a key binding for that, please post it. – Drew Noakes Sep 18 '14 at 22:23
Spacebar toggles between pause and your current speed. – harbichidian Sep 20 '14 at 1:37
@harbichidian, words cannot express my gratitude. – Drew Noakes Sep 20 '14 at 12:10

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