It's very easy to get the source code. You only need two tools. This is for reading the original game's code but you can't recompile this (easily) since there will be compilation errors (most likely).
Commands:
cd dex2jar-2.1-SNAPSHOT
d2j_dex2jar.bat -f -o ../classes.jar ../name.apk
java -jar clr_0_122.jar classes.jar --outputdir decompiled
dex2jar download:
http://bitigee.com/1RlL
CFR Decompiler download:
http://bitigee.com/1RlX
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