I have 5 sprites and some physics. There are a couple events so when planets are pressed gravity is turned on for them and off for the others. I followed the settings on here:
Still, the game runs slow on my Galaxy S3.
Here's the apk file:
I used PhoneGap so make the apk file.
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It runs slowly because PhoneGap is really slow. Try CocoonJS and it should be fast.