Hello @Sabeen_Moin,
I think it’s unlikely this is a Unity 5.6 issue.
Looking at the Scene view, can you select one of your buttons (lets start with the Higher one), and with the Inspector on display, take a screenshot and post it please.
Also, can you post your full NumberWizard.cs script please.
Regarding the download of Unity 5.6, it appears to be located as expected for myself, on the Unity Download Archive page.
See also;
- Forum User Guides : How to apply code formatting within your post