Beta1: Uploaded to Android Market
RC1: Introduced new GUI design
RC2: Corrected target order for stages 3/4 (Thanks TN_Dadx5!)
Final: Added clearer stage/target images (Thanks Todd!)
此版本中的新功能：Created using Android App Inventor, which explains the large size (I know it's large for what is effectively a calculator, but it's the best I can manage at this point).