Could not launch on iPad 1st.

PS : Could launch on iPad 1st.Thank you!
But unstable...

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There is no launch on my iPad 1st generation.
Mothers iPad 2 could launch this app.
I hope you can investigate and will be able to improve.
Why my iPad 1st could not launch this app.

But this app is very,very fun! Thank you!

My iPad 1st : iOS 5.1.1 / 64GB / wi-fi model
iPad 2 : iOS 5.1.1 / 16GB / wi-fi Black model

動物園の猫 about Ion Racer, v1.0.1