Quick bug fix (plus one new simple feature) for Sandbox.

Bug fix:

• Automatically default to first item on startup
• Allow particles to be placed while paused

New features:

• Number keys select corresponding placeable particle type

Downloads:

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• If you may not have .NET 3.5: click here
• To install SDL.NET: **click here **

Controls:

• Esc/Q – Quit the program
• B – Toggle border behavior
• P – Pause / Unpause
• Space – Advance the simulation one step (when paused)
• Left-click – Add a blob of the current kind of particle
• Right-click – Remove a blob of any kind of particle
• 1-9 – Select the corresponding kind of particle

particle