SandBox It's not a game but rather a gaming experience, play with 3D engine physics.

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ConfigKeys:
⇦ ⇧ ⇩ ⇨ = to move
E key (in BuildMode) = to create a model
1 & 2 (in BuildMode) = to chose a model
SHIFT & CTRL (in FlyMode) = to y++/y--
F key = to shoot (sphere_bullet)

*All the rest is on the HUD
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for more informations : http://www.gamemaker3d.com/forum/done/71-sandbox#135

#UPDATE4.2