I know little about coding, but Index seems to lack of a line that specifies to set the game on landscape...
May I ask you some questions?
1- Have you checked if the config file inside your exported project folder specifies the landscape mode? (mine is potrait)
[attachment=0:snjh2gvl][/attachment:snjh2gvl]
2- When importing your project to Intel XDK, do you choose Yes to both the questions at this popup window?
[attachment=2:snjh2gvl][/attachment:snjh2gvl]
3 When exporting, do you specify the supported devices as universal? Is your iPad running iOS8?
[attachment=1:snjh2gvl][/attachment:snjh2gvl]
Also, have you tried to export without minifying?
I hope it will help