How to change the scene view in Unity 5? - c#

Whenever I create a new project in Unity 5 I see this
and I'm not familiar with this scene. The problem is I don't know how to change this scene to this one.
Any solution ?

This means that Unity is in 2D Mode. Click the 2D Button that is next to the Game tab in Unity. That will switch you back to 3D Mode. It is circled in red in the picture below.
And whenever you are creating a new project, make sure to select 3D not 2D and stuff like this won't happen. If it does, click on the 2D button circle in the first image, save scene and exit. That should now be fixed.

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Sprites disappear after game is built (unity engine C#) Not an issue of layer they are on

I am currently writing a 2D game in unity and whenever I build the actual game, the sprites all disappear, the player is the only thing that remains.
However, the sprites are still there, just invisible. It's not an issue of order of layer and am having trouble fixing it.
I am using SpriteShapeController.
SpriteShapeController auto shows as it having a sprite so it made me think I had a sprite already
I just made Custom Square Sprites and added them in.

Run two animations on object in Unity simultaneously

I'm still pretty fresh to the Unity 3D world. I'm trying to get an animation on two children of an object (a door that has the exterior facing outward and a door facing inward). Maybe I'm approaching this the wrong way? See below:
Is there a way in which by pressing one key,i can get both "open" animations for both the inward and outward facing doors to play at the same time? Note: I originally created this FBX in Blender.

Why doesn't my first person character stand on the bridge when stepping on it?

I have made a simple project in Unity 5 and I have added a bridge from 3Ds Max to my scene which is a bridge. The problem is that it does not appear as a real object! I mean that a first person character must walk on the bridge but whenever I test it, it goes through the object. It looks like the bridge does not exist at all.
How can I fix this?
Add Collider to your Bridge 3D model then test it with your Character Controller. Without Collider Unity can't tell when you bump into an object or when you are on top of it.
Select the 3D Bridge, click the Add Component button then type in Box Collider. Adjust the Box Collider to fit the 3D Bridge. You can always use multiple Box Colliders if needed.

Switching between scenes blocks unity camera

If i run a scene normally in unity 3D it looks nice, but if i switch to it from another scene the camera became blocked and crashed without giving me any error!! Am i missing something? I am working with unity pro 4.5.0 and Nyartoolkit .
Here are 2 screenshot of my two scenes:
the first screenshot is my second scene and the second one is the hierarchy of my first scene !!??
It's the same problem when switching from the first scene to the second scene or going back from the second scene to my first one. In all cases the camera became black as it is clear in first screenshot .

My player disappears when launching my 2D Unity game

I am trying to create a 2d platformer game in Unity 5 following these tutorials: https://www.3dbuzz.com/training/view/creating-2d-games-in-unity-45
I am however running into a problem where when I hit the play button in Unity my character simply does not appear inside the game. I made sure he is on the right layer and has all of the required scrips associated to him and still no dice...
Here is a copy of my source code: https://mega.co.nz/#!4YFAVLxA!8UZieNrqI3F1--4HsaLPPfw_ICbCkG7uGZVuWAfmSyY
In the end the issue was that my main camera was not far enough on the Z axis and unity was rendering my player behind the camera!
I fixed it by setting the camera's Z coordinate to -100 instead on -10.

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